Abstract:In this paper, TA2 pure titanium bar as experimental material, the finishing process of the two roughing, heat treatment, The results show that the ring-like defects of pure titanium rods are the two processes of straightening and heat treatment in finishing process to produce a kind of bar under low magnification organization defects. Is the two-roll straightening caused by the edge of the work hardening, material stress increases, the grain growth required to increase the distortion caused by heat treatment after the organization differences. It is proposed to avoid the occurrence of such defects by controlling the thickness of the work layer to avoid the generation of ring-like defects and the use of multi-roll straightening or electric straightening method with smaller straightening force.