The behavior of hydrogen absorption/desorption of Ti600, TC21 and Ti40 alloys was studied. The results show that the initial temperatures of hydrogen absorption/desorption for Ti600, TC21 and Ti40 alloy are 573 and 578.5 °C, 580 and 628.1 °C, 515 and 540 °C, respectively. The behavior of hydrogen absorption/desorption of Ti600 alloy is similar to that of TC21 alloy. The ability of hydrogen absorption/desorption of Ti40 alloy is better than the others’.