The isothermal compression tests of Ti-10.2 Mo-4.9 Zr-5.5 Sn alloy were tested to understand the hot deformation behavior in range of 670

8

20 ℃ and strain rate range of 0.001

1

0 s-1 on a Gleeble-3500 thermo mechanical simulator

and hot deformation activation energy was calculated.The results show that the flow stress is more sensitive to deformation temperature and strain rate

and the flow stress is decreased with the increase of deformation temperature and decrease of strain rate.The deformation activation energy of the alloy is the higher than the self diffusion activation energy of pureαtitanium and pureβtitanium alloy.The constitutive equation of Ti-10.2 Mo-4.9 Zr-5.5 Sn alloy is built up based on multiple linear regression method

where the correlation coefficient and the average relative error are 0.987 5 and 4.99% after an error calculation

showing a high precision.