Abstract: To investigate the effects of forming process and temperature environment on the mechanical propertiesof titanium alloy and carbon nanotube composite (CNTs/Ti),this study modifies the surface of the titanium alloy material with carbon nanotubes. The CNTs/Ti powder is prepared by the wet ball milling method, and the tensile specimens are prepared by the selective laser melting technology.Subsequently,the tensile mechanical properties ofCNTs/Ti are systematically studied underdifferent temperature environments.The results show that when the ball milling timeis 5 hours, the content of element C significantly increases to 22.78at%. At -58 ℃,the specimen with a CNTs content of 0.6wt‰ has the highest tensile strength. The trend under the low-temperature cycle is the same as that at low temperature (-58 ℃). At 600 ℃,the specimen with a CNTs content of 0wt‰ has the highest tensile strength.By observing the fracture surface of the specimens, it is found that the specimens still maintain high plasticity at-58 ℃ and 600 ℃.

Key words: titanium alloy and carbon nanocomposites, ball milling method, selective laser melting, tensile strength, low-temperature cycling