It is not possible to include a whole Translation Memory in the export of a WorldServer project or Task to a WSXZ package. This would lead to very big package size and a long time to export. Only the relevant portion of the Translation Memory will be exported. More information about the content of WSXZ package can be found in this article:
WorldServer - What is included in WorldServer Export and in a WorldServer Return Package?A Translation Memory can be exported from
WorldServer by following the steps described in this article:
WorldServer - How to export a translation memory (TM)