SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13D
                               (Amendment No. 4)*

                    Under the Securities Exchange Act of 1934


                           TITANIUM METALS CORPORATION
                                (Name of Issuer)

                     Common Stock, $0.01 par value per share
                         (Title of Class of Securities)

                                   888339 10 8
                                 (CUSIP Number)

                                STEVEN L. WATSON
                              THREE LINCOLN CENTRE
                                   SUITE 1700
                                5430 LBJ FREEWAY
                            DALLAS, TEXAS 75240-2694
                                 (972) 233-1700
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  May 18, 2001
                      (Date of Event which requires Filing
                               of this Statement)

         If the filing person has  previously  filed a statement on Schedule 13G
to report the  acquisition  that is the  subject of this  Schedule  13D,  and is
filing  this  schedule  because  of  sections   240.13d-1(e),   240.13d-1(f)  or
240.13d-1(g), check the following box. [ ]

         *The  remainder  of this cover page shall be filled out for a reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

         The information  required on the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes).

                         (Continued on following pages)






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Tremont Corporation

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      WC and AF

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Tremont Group, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Tremont Holdings, LLC

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      OO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      NL Industries, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      New Jersey

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Valhi, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Valhi Group, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Nevada

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      National City Lines, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      NOA, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Dixie Holding Company

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Dixie Rice Agricultural Corporation, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Louisiana

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Southwest Louisiana Land Company, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Louisiana

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Contran Corporation

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      The Combined Master Retirement Trust

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      WC

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    14,441,905
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     14,441,905

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      14,441,905

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      45.4%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      EP






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Harold Simmons Foundation, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    12,280,005
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     12,280,005

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      12,280,005

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      38.6%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  888339 10 8

     1       NAMES OF REPORTING PERSONS AND I.R.S. IDENTIFICATION NOS. OF SUCH
             PERSONS (ENTITIES ONLY)

                      Harold C. Simmons

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP(SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [ X ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      USA

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    14,441,905
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                               14,441,905

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      -0-

    12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [ X ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      0.0%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      IN






                                 AMENDMENT NO. 4
                                 TO SCHEDULE 13D

         This amended statement on Schedule 13D (collectively, this "Statement")
relates  to the  common  stock,  $0.01 par value per share  (the  "Shares"),  of
Titanium Metals Corporation, a Delaware corporation (the "Company"). Items 2 and
5 of this Statement are hereby amended as set forth below.

Item 2.  Identity and Background.

         Item 2 is hereby amended and restated in its entirety as follows:

         (a) This Statement is filed by (i) Tremont  Corporation  ("Tremont") as
the direct  holder of Shares,  (ii) The Combined  Master  Retirement  Trust (the
"CMRT") as the direct  holder of Shares and by virtue of its indirect  ownership
of securities of Tremont (as described below in this Statement), (iii) by virtue
of the direct and indirect  ownership  of  securities  of Tremont (as  described
below in this Statement),  Tremont Group,  Inc. ("TGI"),  Tremont Holdings,  LLC
("TRE  Holdings"),  NL Industries,  Inc. ("NL"),  Valhi, Inc.  ("Valhi"),  Valhi
Group, Inc. ("VGI"), National City Lines, Inc. ("National"),  NOA, Inc. ("NOA"),
Dixie Holding Company ("Dixie  Holding"),  Dixie Rice Agricultural  Corporation,
Inc.  ("Dixie  Rice"),  Southwest  Louisiana Land Company,  Inc.  ("Southwest"),
Contran  Corporation  ("Contran") and the Harold Simmons  Foundation,  Inc. (the
"Foundation")  and (iv) by virtue of his  positions  with Contran and certain of
the  other  entities  (as  described  in  this  Statement),  Harold  C.  Simmons
(collectively,  the  "Reporting  Persons").  By  signing  this  Statement,  each
Reporting Person agrees that this Statement is filed on its or his behalf.

         Tremont and the CMRT are the direct holders of approximately  38.6% and
6.8%,  respectively,  of the 31,817,801 Shares  outstanding as of April 30, 2001
according to the Company's  Quarterly  Report on Form 10-Q for the quarter ended
March 31, 2001 (the "Outstanding Shares").  Tremont may be deemed to control the
Company.

         TGI and TRE Holdings are the direct holders of approximately  80.0% and
0.1%,  respectively,  of the  outstanding  shares of  Tremont  common  stock and
together may be deemed to control Tremont. Valhi and TRE Holdings are the direct
holders of 80.0% and 20.0%,  respectively of the outstanding common stock of TGI
and together may be deemed to control TGI. NL is the sole member of TRE Holdings
and may be deemed to control  TRE  Holdings.  Valhi and  Tremont  are the direct
holders of  approximately  60.4% and  20.5%,  respectively,  of the  outstanding
common  stock of NL and  together  may be deemed to control NL.  VGI,  National,
Contran,  the Foundation,  the Contran  Deferred  Compensation  Trust No. 2 (the
"CDCT No. 2") and the CMRT are the direct holders of 81.7%,  9.5%,  1.8%,  0.5%,
0.4% and  0.1%,  respectively,  of the  common  stock of Valhi.  Together,  VGI,
National  and Contran may be deemed to control  Valhi.  National,  NOA and Dixie
Holding  are the  direct  holders  of  approximately  73.3%,  11.4%  and  15.3%,
respectively,  of the outstanding common stock of VGI. Together,  National,  NOA
and Dixie  Holding may be deemed to control VGI.  Contran and NOA are the direct
holders of  approximately  85.7% and  14.3%,  respectively,  of the  outstanding
common stock of National and together may be deemed to control National. Contran
and  Southwest  are  the  direct  holders  of  approximately  49.9%  and  50.1%,
respectively,  of the outstanding common stock of NOA and together may be deemed
to  control  NOA.  Dixie Rice is the  direct  holder of 100% of the  outstanding
common  stock of Dixie  Holding  and may be deemed  to  control  Dixie  Holding.
Contran is the holder of 100% of the outstanding  common stock of Dixie Rice and
may be deemed to control  Dixie  Rice.  Contran  is the holder of  approximately
88.9% of the outstanding  common stock of Southwest and may be deemed to control
Southwest.

         Substantially  all of  Contran's  outstanding  voting  stock is held by
trusts  established  for the benefit of certain  children and  grandchildren  of
Harold C. Simmons (the "Trusts"),  of which Mr. Simmons is the sole trustee.  As
sole trustee of each of the Trusts, Mr. Simmons has the power to vote and direct
the  disposition of the shares of Contran stock held by each of the Trusts.  Mr.
Simmons, however,  disclaims beneficial ownership of any shares of Contran stock
that the Trusts hold.

         The CMRT directly holds  approximately  6.8% of the Outstanding  Shares
and 0.1% of the outstanding  shares of Valhi common stock. Valhi established the
CMRT as a trust to  permit  the  collective  investment  by master  trusts  that
maintain  the  assets of  certain  employee  benefit  plans  Valhi  and  related
companies adopt. Mr. Simmons is the sole trustee of the CMRT and a member of the
trust investment  committee for the CMRT. Mr. Simmons is a participant in one or
more of the employee benefit plans that invest through the CMRT.

         The Foundation  directly holds  approximately  0.5% of the  outstanding
Valhi common  stock.  The  Foundation is a tax-exempt  foundation  organized for
charitable  purposes.  Harold C.  Simmons is the chairman of the board and chief
executive officer of the Foundation and may be deemed to control the Foundation.

         The CDCT No. 2 directly  holds  approximately  0.4% of the  outstanding
Valhi common stock. U.S. Bank National  Association serves as the trustee of the
CDCT No. 2. Contran  established the CDCT No. 2 as an irrevocable  "rabbi trust"
to assist Contran in meeting certain deferred  compensation  obligations that it
owes to Harold C. Simmons.  If the CDCT No. 2 assets are insufficient to satisfy
such  obligations,   Contran  is  obligated  to  satisfy  the  balance  of  such
obligations  as they come due.  Pursuant to the terms of the CDCT No. 2, Contran
(i) retains the power to vote the shares of Valhi common stock held  directly by
the CDCT No. 2, (ii) retains dispositive power over such shares and (iii) may be
deemed the indirect beneficial owner of such shares.

         Valmont Insurance  Company  ("Valmont") and a subsidiary of NL directly
own 1,000,000 shares and 1,186,200 shares, respectively,  of Valhi common stock.
Valhi is the direct  holder of 100% of the  outstanding  common stock of Valmont
and may be deemed to control Valmont. Pursuant to Delaware law, Valhi treats the
shares of Valhi  common  stock  that  Valmont  and the  subsidiary  of NL own as
treasury  stock for voting  purposes and for the purposes of this Statement such
shares are not deemed outstanding.

         Mr.  Harold C.  Simmons is  chairman  of the board and chief  executive
officer of TGI, Valhi, VGI, National,  NOA, Dixie Holding, Dixie Rice, Southwest
and Contran.  Mr.  Simmons is also chairman of the board of NL and a director of
Tremont.

         By virtue of the holding of the offices,  the stock  ownership  and his
service as trustee,  all as described  above,  (a) Mr.  Simmons may be deemed to
control the  entities  described  above and (b) Mr.  Simmons and certain of such
entities  may be deemed  to  possess  indirect  beneficial  ownership  of Shares
directly held by certain of such other entities.  However, Mr. Simmons disclaims
beneficial  ownership of the Shares beneficially owned,  directly or indirectly,
by any of such entities,  except to the extent of his vested beneficial interest
in the Shares held by the CMRT.

         Harold C.  Simmons'  spouse is the direct owner of 69,475  shares of NL
common stock and 77,000 shares of Valhi common stock.  Mr. Simmons may be deemed
to share indirect beneficial ownership of such shares. Mr. Simmons disclaims all
such beneficial ownership.

         Certain information  concerning the directors and executive officers of
the Reporting  Persons,  including  offices held by Mr.  Simmons is set forth on
Schedule B attached hereto and incorporated herein by reference.

         (b) The principal office of Tremont is located at 1999 Broadway,  Suite
4300,  Denver,  Colorado 80202. The principal offices of TRE Holdings and NL are
located at Two Greenspoint Plaza,  16825 Northchase Drive, Suite 1200,  Houston,
Texas 77060.  The principal  offices of TGI, Valhi,  VGI,  National,  NOA, Dixie
Holding,  Contran,  the CMRT and the Foundation are located at, and the business
address of Harold C. Simmons is, Three Lincoln Centre,  5430 LBJ Freeway,  Suite
1700, Dallas, Texas 75240-2697. The principal office of Dixie Rice is located at
600  Pasquiere  Street,  Gueydan,  Louisiana  70542.  The  principal  office  of
Southwest is located at 402 Canal Street,  Houma,  Louisiana 70360. The business
addresses of the remaining  directors  and  executive  officers of the Reporting
Persons are set forth on Schedule B to this Statement and incorporated herein by
reference.

         (c)  Tremont  is  principally   engaged  through  the  Company  in  the
production of titanium metal products,  through NL in the production of titanium
dioxide pigments and through other companies in real estate development.

         TGI is engaged in holding shares of Tremont common stock.

         TRE Holdings is engaged in holding shares of TGI common stock.

         NL is principally engaged in the production of titanium dioxide
pigments.

         In addition to activities  engaged in through Tremont,  the Company and
NL, Valhi is engaged through other companies in the ergonomic  computer  support
systems,  precision ball bearing slides,  security products and waste management
industries.

         In  addition  to  activities  engaged  in  through  Valhi and the other
companies they may be deemed to control,  as described above, and in addition to
holding the  securities  described  above,  (i) VGI is engaged in holding  notes
receivable;  (ii) National is engaged in holding notes receivable and,  directly
or through  other  companies,  in real estate,  oil and gas  activities  and the
rental and sales of  compressors  and related  products;  (iii) Dixie Holding is
engaged  in  holding  preferred  stock of  Contran;  (iv) NOA is engaged in real
estate  and  holding  notes  receivable;  (v)  Dixie  Rice  is  engaged  in land
management, agriculture and oil and gas activities; (vi) Southwest is engaged in
land  management,  agriculture and oil and gas activities;  and (vii) Contran is
engaged through other companies in the production of, among other things,  steel
rod, wire and wire products.

         The CMRT is a trust Valhi formed to permit the collective investment by
trusts that  maintain  the assets of certain  employee  benefit  plans Valhi and
related companies adopt. The employee benefit plans the trusts  participating in
the CMRT fund are  subject  to certain  provisions  of the  Employee  Retirement
Income Security Act of 1974, as amended.

         The  Foundation is a tax-exempt  foundation  organized  for  charitable
purposes.

         (d) None of the  Reporting  Persons or, to the best  knowledge  of such
persons,  any of the  persons  named in  Schedule B to this  Statement  has been
convicted in a criminal  proceeding  in the past five years  (excluding  traffic
violations or similar misdemeanors).

         (e) None of the  Reporting  Persons or, to the best  knowledge  of such
persons,  any person  named in  Schedule B to this  Statement,  was a party to a
civil proceeding of a judicial or administrative body of competent  jurisdiction
as a result of which such  person was or is  subject  to a  judgment,  decree or
final  order  enjoining  future  violations  of,  or  prohibiting  or  mandating
activities subject to, federal or state securities laws or finding any violation
with respect to such laws.

         (f)  Contran,  Dixie  Holding,  National,  Valhi,  TGI and  Tremont are
Delaware corporations.  TRE Holdings is a Delaware limited liability company. NL
is a New  Jersey  corporation.  VGI is a  Nevada  corporation.  NOA  is a  Texas
corporation and the Foundation is a Texas non-profit corporation. Dixie Rice and
Southwest  are Louisiana  corporations.  The CMRT is governed by the laws of the
state of Texas,  except as those laws are  superseded by federal law.  Harold C.
Simmons and all the persons  named on Schedule B to this  Statement are citizens
of the United States, except as otherwise indicated on such Schedule.

Item 5.  Interest in Securities of the Issuer.

         No change except for the addition of the following:

         (a) Tremont and the CMRT are the direct beneficial owners of 12,280,005
and 2,161,900 Shares, respectively.

         By virtue of the relationships described under Item 2 of this
Statement:

                  (1) TGI, TRE Holdings,  NL, Valhi, VGI,  National,  NOA, Dixie
         Holding, Dixie Rice, Southwest,  Contran and the Foundation may each be
         deemed  to  be  the   beneficial   owner  of  the   12,280,005   Shares
         (approximately  38.6% of the  Outstanding  Shares) that  Tremont  holds
         directly; and

                  (2) The CMRT and  Harold C.  Simmons  may each be deemed to be
         the beneficial owner of the 14,441,905 Shares  (approximately  45.4% of
         the Outstanding Shares) that Tremont and the CMRT hold directly.

         Mr. Simmons disclaims beneficial ownership of all Shares.

         (b)      By virtue of the relationships described in Item 2:

                  (1) Tremont, TGI, TRE Holdings, NL, Valhi, VGI, National, NOA,
         Dixie Holding,  Dixie Rice,  Southwest,  Contran and the Foundation may
         each be deemed to share the power to vote and direct the disposition of
         the 12,280,005 Shares  (approximately  38.6% of the Outstanding Shares)
         that Tremont holds directly; and

                  (2) The CMRT and Harold C. Simmons may each be deemed to share
         the power to vote and direct the  disposition of the 14,441,905  Shares
         (approximately  45.4% of the  Outstanding  Shares) that Tremont and the
         CMRT hold directly.

         (c) The table below sets forth transactions in the Shares by the
Reporting Persons during the last 60 days. The CMRT executed all of such
transactions on the New York Stock Exchange.




                                                                                         Approximate Price
                                                            Amount of                        Per Share
        Date                  Transaction                     Shares            (exclusive of commissions and fees)
     ---------             -----------------             ---------------               ---------------------
                                                                                     
      05/14/01                    Sale                            40,000                      $13.0146
      05/15/01                    Sale                            80,000                      $13.0805
      05/16/01                    Sale                            55,000                      $13.6594
      05/17/01                    Sale                            60,000                      $13.8118
      05/18/01                    Sale                            60,000                      $13.8810
      05/21/01                    Sale                           160,000                      $14.0871
      05/22/01                    Sale                            45,000                      $14.2558
      05/23/01                    Sale                               600                      $14.0500
      05/29/01                    Sale                            15,000                      $12.3000
      05/30/01                    Sale                            18,300                      $12.9268
      05/31/01                    Sale                            25,100                      $13.1112







                                    Signature

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Statement is true, complete and
correct.

Date:  June 1, 2001




                                                          /s/ Harold C. Simmons
                                                          ----------------------
                                                          Harold C. Simmons
                                                          Signing in the
                                                          capacities listed on
                                                          Schedule "A" attached
                                                          hereto and
                                                          incorporated herein by
                                                          reference.





                                    Signature

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Statement is true, complete and
correct.

Date:  June 1, 2001




                                                          /s/ J. Landis Martin
                                                          ----------------------
                                                          J. Landis Martin
                                                          Signing in the
                                                          capacity listed on
                                                          Schedule "A" attached
                                                          hereto and
                                                          incorporated herein by
                                                          reference.





                                    Signature

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Statement is true, complete and
correct.

Date:  June 1, 2001





                                                          /s/ Steven L. Watson
                                                          ----------------------
                                                          Steven L. Watson
                                                          Signing in the
                                                          capacities listed on
                                                          Schedule "A" attached
                                                          hereto and
                                                          incorporated herein by
                                                          reference.





                                   SCHEDULE A


HAROLD C. SIMMONS, in his individual capacity and as trustee for THE COMBINED
MASTER RETIREMENT TRUST.


J. LANDIS MARTIN,  as president and chief executive  officer of TREMONT
CORPORATION  and NL INDUSTRIES,  INC. and president of TREMONT
HOLDINGS, LLC.


STEVEN L. WATSON, as president or vice president of each of:

CONTRAN CORPORATION
DIXIE HOLDING COMPANY
DIXIE RICE AGRICULTURAL CORPORATION, INC.
HAROLD SIMMONS FOUNDATION, INC.
NATIONAL CITY LINES, INC.
NOA, INC.
SOUTHWEST LOUISIANA LAND COMPANY, INC.
TREMONT GROUP, INC.
VALHI GROUP, INC.
VALHI, INC.






                                   Schedule B


         The  names  of  the  directors   and  executive   officers  of  Contran
Corporation  ("Contran"),  Dixie Holding Company ("Dixie  Holding"),  Dixie Rice
Agricultural  Corporation,  Inc. ("Dixie Rice"), the Harold Simmons  Foundation,
Inc. (the "Foundation"),  National City Lines, Inc. ("National"), NL Industries,
Inc.  ("NL"),  NOA,  Inc.  ("NOA"),   Southwest  Louisiana  Land  Company,  Inc.
("Southwest"),  Tremont  Corporation  ("Tremont"),  Tremont Group,  Inc.,  Valhi
Group,  Inc.  ("VGI") and Valhi,  Inc.  ("Valhi"),  and their present  principal
occupations are set forth below. Except as otherwise indicated, each such person
is a citizen of the United  States of America and the  business  address of each
such person is 5430 LBJ Freeway, Suite 1700, Dallas, Texas 75240.



                          Name                                           Present Principal Occupation
-----------------------------                             ---------------------------------
                                                       
Susan E. Alderton (1)                                     Vice president,  treasurer and chief  financial  officer of
                                                          NL  and  Tremont  Holdings,  LLC  ("TRE  Holdings");  and a
                                                          director of Tremont Corporation (the "Company").

Eugene K. Anderson                                        Vice president of Contran, Dixie Holding, Dixie
                                                          Rice, NOA, National, Southwest, TGI, VGI and Valhi; and
                                                          treasurer of the Foundation.

Thomas E. Barry (2)                                       Vice president for executive affairs at Southern  Methodist
                                                          University  and  professor of marketing in the Edwin L. Cox
                                                          School of Business at Southern Methodist University;  and a
                                                          director of Valhi.

Richard J. Boushka (3)                                    Director  of  Tremont;   principal  of  Boushka  Properties
                                                          (private investment firm).

Norman S. Edelcup (4)                                     Senior  vice  president  business  development  of  Florida
                                                          Savings  Bancorp;  director  of Valhi;  and  trustee of the
                                                          Baron Funds, a mutual fund group.

Lisa Simmons Epstein                                      Director and president of the Foundation.

David B. Garten (5)                                       Vice  president,  general  counsel and secretary of NL; and
                                                          vice president and secretary of TRE Holdings.

Edward J. Hardin (6)                                      Partner  of the law  firm of  Rogers &  Hardin  LLP;  and a
                                                          director of Valhi.

Robert D. Hardy (5)                                       Vice president and controller of NL and TRE Holdings.

J. Mark Hollingsworth                                     Vice  president  and  general  counsel  of  Contran,  Dixie
                                                          Holding,  Dixie Rice, NOA,  National,  Southwest,  TGI, VGI
                                                          and Valhi;  and general  counsel of the  Foundation,  CompX
                                                          International  Inc., a manufacturer  of ergonomic  computer
                                                          support   systems,   precision   ball  bearing  slides  and
                                                          security  products that is affiliated with Valhi ("CompX"),
                                                          and The Combined  Master  Retirement  Trust,  a trust Valhi
                                                          established to permit the  collective  investment by master
                                                          trusts  that  maintain  the  assets  of  certain   employee
                                                          benefit  plans  Valhi  and  related  companies  adopt  (the
                                                          "CMRT").

Keith A. Johnson                                          Controller of the Foundation.

William J. Lindquist                                      Director and senior vice president of Contran, Dixie Holding, NOA,
                                                          National, TGI and VGI; senior vice president of Dixie Rice,
                                                          Southwest and Valhi.

A. Andrew R. Louis                                        Secretary of Contran,  CompX,  Dixie  Holding,  Dixie Rice,
                                                          NOA, National, Southwest, TGI, VGI and Valhi.

Kelly D. Luttmer                                          Tax director of Contran, CompX, Dixie Holding, Dixie Rice, NOA,
                                                          National, Southwest, TGI, VGI and Valhi.

J. Landis Martin (7)                                      President,  chief  executive  officer and a director of NL;
                                                          president   of  TRE   Holdings;   chairman  of  the  board,
                                                          president  and  chief  executive  officer  of  Tremont  and
                                                          Titanium Metals Corporation (the "Company").

Andrew McCollam, Jr. (8)                                  President  and a director of  Southwest;  director of Dixie
                                                          Rice; and a private investor.

Harold M. Mire (9)                                        Vice president of Dixie Rice and Southwest.

Robert E. Musgraves (7)                                   Executive  vice  president  and  general   counsel  of  the
                                                          Company; and vice president,  general counsel and secretary
                                                          of Tremont.

Bobby D. O'Brien                                          Vice president and treasurer of Contran, Dixie Holding, Dixie
                                                          Rice, NOA, National, TGI, VGI and Valhi; and vice president of
                                                          Southwest.

Kenneth R. Peak (10)                                      President,  chief  executive  officer  and  chairman of the
                                                          board of  Contango  Oil & Gas  Company,  a publicly  traded
                                                          independent   oil  and  gas   exploration   and  production
                                                          company; and a director of NL.

Glenn R. Simmons                                          Vice chairman of the board of Contran,  Dixie Holding, NOA,
                                                          National,  TGI,  VGI and  Valhi;  chairman  of the board of
                                                          CompX   and   Keystone   Consolidated   Industries,    Inc.
                                                          ("Keystone"),  a  manufacturer  of steel rod, wire and wire
                                                          products  that is  affiliated  with  Contran;  director and
                                                          executive  vice  president of Southwest and Dixie Rice; and
                                                          a director of NL, Tremont and the Company.

Harold C. Simmons                                         Chairman of the board and chief executive  officer of
                                                          Contran,  Dixie Holding,  Dixie Rice, the Foundation, NOA,
                                                          National, Southwest, TGI, VGI and Valhi; chairman of the
                                                          board of NL; director of Tremont; and trustee and member of
                                                          the trust investment committee of the CMRT.

Richard A. Smith (9)                                      Director and president of Dixie Rice.

Thomas P. Stafford (11)                                   Co-founder   of  Stafford,   Burke  and  Hecker,   Inc.,  a
                                                          consulting company; director of NL, Tremont and the
                                                          Company; and a director of CMI Corporation and The
                                                          Wackenhut Corp.

Avy H. Stein (12)                                         Director of Tremont;  managing  partner of Willis,  Stein &
                                                          Partners, a private equity investment firm.

Gregory M. Swalwell                                       Vice president and controller of Contran, Dixie Holding, NOA,
                                                          National, TGI, VGI and Valhi; and vice president of Dixie
                                                          Rice and Southwest.

J. Walter Tucker, Jr. (13)                                President,  treasurer  and a director  of Tucker & Branham,
                                                          Inc.,  a  mortgage  banking,   insurance  and  real  estate
                                                          company;   vice  chairman  of  the  board  of  Keystone;  a
                                                          director  of Valhi;  and a member  of the trust  investment
                                                          committee of the CMRT.

Mark A. Wallace (7)                                       Executive  vice  president,  chief  financial  officer  and
                                                          treasurer  of  the  Company;  and  vice  president,   chief
                                                          financial officer and treasurer of Tremont.

Steven L. Watson                                          Director and president of Contran, Dixie Holding, NOA,
                                                          National, TGI, VGI and Valhi; director and executive vice
                                                          president of Dixie Rice and Southwest; director, vice
                                                          president and secretary of the Foundation; and a
                                                          director of Tremont, NL and the Company.

Lawrence A. Wigdor (5)                                    Director and executive vice president of NL.


----------

(1)      The principal business address for Ms. Alderton is 70 East 55th Street,
         8th Floor, New York, New York 10022.

(2)      The  principal  business  address for Dr.  Barry is Southern  Methodist
         University, Perkins Administration Bldg. #224, Dallas, Texas 75275.

(3)      The principal  business  address for Mr.  Boushka is 7701 East Kellogg,
         Suite 650, Wichita, Kansas 67207.

(4)      The principal  business address for Mr. Edelcup is 8181 Southwest 117th
         Street, Pinecrest, Florida 33156.

(5)      The principal business address for Messrs.  Garten, Hardy and Wigdor is
         Two Greenspoint  Plaza,  16825 Northchase Drive,  Suite 1200,  Houston,
         Texas 77060.

(6)      The principal  business address for Mr. Hardin is 229 Peachtree Street,
         N.E., Suite 2700, Atlanta, Georgia 30303.

(7)      The  principal  business  address for  Messrs.  Martin,  Musgraves  and
         Wallace is 1999 Broadway, Suite 4300, Denver, Colorado 80202.

(8)      The principal  business  address for Mr.  McCollam is 402 Canal Street,
         Houma, Louisiana 70360.

(9)      The  principal  business  address  for  Messrs.  Mire and  Smith is 600
         Pasquiere Street, Gueydan, Louisiana 70542-0010.

(10)     The principal  business address for Mr. Peak is 3700 Buffalo  Speedway,
         Suite 960, Houston, Texas 77098.

(11)     The  principal  business  address  for Gen.  Stafford  is 1006  Cameron
         Street, Alexandria, Virginia 22314.

(12)     The  principal  business  address for Mr. Stein is 227 West Monroe St.,
         Suite 4300, Chicago, Illinois 60606.

(13)     The  principal  business  address  for  Mr.  Tucker  is 400 E.  Central
         Boulevard, Orlando, Florida 32801.






                                   SCHEDULE C


         Based upon ownership filings with the Commission or upon information
provided by the persons listed on Schedule B to this Statement, such persons may
be deemed to personally beneficially own Shares, as outlined below:



                                                              Shares                 Options
                       Name                                    Held                  Held (1)               Total
            --------------------------                     -----------              -----------         -----------
                                                                                                
Susan E. Alderton                                               -0-                     -0-                  -0-

Eugene K. Anderson                                              -0-                     -0-                  -0-

Thomas E. Barry                                                 -0-                     -0-                  -0-

Richard J. Boushka                                            6,800                     -0-                6,800

Norman S. Edelcup                                               -0-                     -0-                  -0-

Lisa Simmons Epstein                                            -0-                     -0-                  -0-

David B. Garten                                                 -0-                     -0-                  -0-

Edward J. Hardin                                                -0-                     -0-                  -0-

Robert D. Hardy                                                 -0-                     -0-                  -0-

J. Mark Hollingsworth                                           -0-                     -0-                  -0-

Keith A. Johnson                                                -0-                     -0-                  -0-

William J. Lindquist                                            -0-                     -0-                  -0-

A. Andrew R. Louis                                              -0-                     -0-                  -0-

Kelly D. Luttmer                                                100                     -0-                  100

J. Landis Martin (2)                                        136,109                 191,400              327,509

Andrew McCollam, Jr.                                            -0-                     -0-                  -0-

Harold M. Mire                                                  -0-                     -0-                  -0-

Robert E. Musgraves (3)                                      50,350                  49,800              100,150

Bobby D. O'Brien                                                -0-                     -0-                  -0-

Kenneth R. Peak                                                 -0-                     -0-                  -0-

Glenn R. Simmons                                              4,000                  10,000               14,000

Harold C. Simmons (4)                                           -0-                     -0-                  -0-

Richard A. Smith                                                -0-                     -0-                  -0-

Thomas P. Stafford                                            3,600                  12,750               16,350

Avy H. Stein                                                    -0-                     -0-                  -0-

Gregory M. Swalwell                                             -0-                     -0-                  -0-

J. Walter Tucker, Jr.                                           -0-                     -0-                  -0-

Mark A. Wallace (5)                                          52,500                  36,600               89,100

Steven L. Watson                                              9,500                   5,000               14,500

Lawrence A. Wigdor                                              -0-                     -0-                  -0-


----------

(1)      Represents  Shares  issuable  pursuant to the exercise of stock options
         within 60 days of the date of this Statement.

(2)      Includes  (i)  400  Shares  Mr.  Martin's  daughters  hold,  beneficial
         ownership  of  which  Mr.  Martin  disclaims,  and (ii)  21,869  Shares
         issuable  to Mr.  Martin or  parties  or  entities  related to him upon
         conversion  of 16,332  (13,332 of which he holds  indirectly)  of the 6
         5/8% Convertible Preferred Securities, Beneficial Unsecured Convertible
         Securities of TIMET Capital Trust 1.

(3)      Includes  (i) 200 Shares owned by the other  members of Mr.  Musgraves'
         household,  beneficial  ownership of which Mr. Musgraves  disclaims and
         (ii) 32,000  Shares that  represent  restricted  shares with respect to
         which  Mr.  Musgraves  has the  power  to vote  and  right  to  receive
         dividends.

(4)      Mr. Simmons may be deemed to possess indirect  beneficial  ownership of
         the Shares as described  in Item 5(a) of this  Statement.  Mr.  Simmons
         disclaims beneficial ownership of all Shares.

(5)      Includes 32,000 Shares that represent restricted shares with respect to
         which Mr. Wallace has the power to vote and right to receive dividends.