β Grain Growth Rule of TC18 Titanium Alloy during Solid-Solution

TC18 titanium alloy was solid-solution treated in the β phase region, and the effects of solid-solution temperature and holding time on the size of β grain were studied. The results show that the size of β grain increased with increase of solid-solution temperature and holding time, but the growth speed of the grain decreased with increase of holding time. Regression analysis was employed to establish regression equation between solid-solution temperature, holding time and the size of β grain. The growth process of grains was affected by thermodynamics and kinetics factors when holding time was shorter, the effect of the former gradually decreased with holding time.