Вот такой мне совсем непрофильный текст попался.... совсем ничего в металлургии не понимаю....
Речь идет об разработке титановых сплавов
There are several design allowables that are unique to landing gear applications. One of these is a test for the torque-tensile properties. The equipment used to perform a torque-tensile test is very difficult to find, but one such machine was located at the ХХХХ State Technical University. ZZZZ personnel in Moscow evaluated this equipment, then contracted with ХSTU to perform a series of tube-torsion test on both Ti 5553 and Ti 10-2-3. YYYY supplied heat treated Ti 5553 STA180 and Ti 10-2-3 STA 170 bars. XTSU machined the bars into tubes with specified diameter to wall thickness ratios. The tubes were strain gaged and tested, the data sent to ZZZZ for analysis.

Интересует, что такое по-русски:
tube-torsion test
torque-tensile test
И как понять, что XTSU machined the bars into tubes.

Если нужен более широкий контекст, могу представить.
Буду весьма благодарна за помощь!