Files with tmt suffix can be usually found as temporary files that were or still are used by applications.
There is one other file type using
the TMT file extension!
.tmt - TimeCult project
TMT file extension - Temporary file
What is tmt file? How to open tmt files?
File type specification:
File extension tmt is sometimes used for temporary files. These files may be created by computer programs for a variety of purposes; principally when a program cannot allocate enough memory for its tasks, when the program is working on data bigger than architecture's address space, or as a primitive form of inter-process communication.