Aiming at solving those special problems in titanium equipment manufacturing (eg. hydrogen brittleness, cracks, Fe pollution, and etc.), the key links in industrial titanium trans-heat equipment manufacturing, that is welding of thin-wall tubes and tube-sheet (mainly about welding properties and main technical points),have been analyzed, according to pre-welding tests and engineering practice. In order to get satisfying result, some peculiar technical measures, such as full preparation of welding-spot, choosing of welding methods and facilities, adjusting and selecting of technical parameters, and so on, are adopted.