Martin Marietta Materials, Inc. (NYSE:MLM) is in talks to buy Texas Industries, Inc. (NYSE:TXI), according to anonymous sources said to be close to the deal, report Aaron Kirchfeld, David Welch and Thomas Black for Bloomberg. We could have official details on the deal sometime next week, but it could be an all-stock transaction (though the sources said there have been previous snags and it’s still possible that the whole thing falls through). Southeastern Asset Management Inc. and NNS Holding (Nassef Sawiris’ investment vehicle) own 51% of Texas Industries, Inc. (NYSE:TXI) between them, and reportedly have wanted to exit the company for some…