Abstract: The effects of different heat treatment processes on the microstructure and mechanical properties of titanium alloy tubing were studied by means of optical microscope, scanning electron microscope, tensile testing machine and impact testing machine. The results show that the solid solution temperature has a great influence on the grain morphology and phase proportion of titanium alloy tubing. In the α+β two-phase region, with the increase of solution temperature, the proportion of αphase in the microstructure decreases. At 850 ℃ solution for 1 h air cooling +550 ℃ aging for 2 h air cooling, and 900 ℃solution for1 h air cooling +550 ℃ aging for 2 h air cooling, under these two heat treatment processes, the bimodal structure of titanium alloy is obtained. The heat treatment process of 850 ℃ solid solution for 1 h air cooling +550 ℃ aging for 2 h air cooling can achieve excellent matching of strength and toughness of titanium alloy tubing, and the comprehensive properties meet the requirements of SY/T 6896.3 standard for 110 ksi steel grade titanium alloy tubing.