The hot deformation behaviors of TB9 alloy at 850-1050℃ and strain rate of 0.01-10 s~(-1)were studied by hot compressing testing on Gleeble-3800 simulator at the deformation degree of 0.7. The constitutive equations of as-cast TB9 titanium alloy during hot deformation were established based on the hyperbolic sine equations of Arrhenius type and coefficient Z. The results show the flow stress of TB9 titanium alloy decreases with the increase of deformation temperature and increases with the increase of strai...