Abstract: The effects of carbon contents on the microstructure, room temperature mechanical properties of a α+β titanium alloy Ti-4.5Al-3.5Zr-2Fe were investigated.The results show that the addition of carbon lead to the refinement of original β grain and the transformation of the as-cast solidification microstructure from Widmanstatten to basketnet structure.When the amount of carbon increases from 0.1wt%to 0.3wt%, the TiC phase grows from small and nearly equiaxial to short rod and long strip.After hot rolling at 980 ℃, the strength of the alloy is increased, the plasticity is up to 15%, and the mechanical properties are obviously improved.This is due to the fact that the as-cast microstructure is broken during the rolling process, a large number of dislocation plugs accumulate in the grains, through EBSD texture analysis, it is found that as the carbon content increases, the strength of texture decreases, and TiC phase provides nucleation particles for α recrystallization.Among them, Ti-4.5Al-3.5Zr-2Fe-0.1C alloy exhibit an excellent balance of strength and elongation to failure at room temperature.