Thermal stability of deformation twins in cryogenic rolled CP-Ti

In this work, abundant types of deformation twins were introduced in CP-Ti by cryogenic rolling. The stability of the twins under the annealing process and their contribution to texture were investigated. The EBSD results revealed that {1122} compression twins as the primary twin result in the texture with c-axis near ND and RD, while {1012}and {1121} tension twins as the primary twin induce the texture with c-axis nearly parallel to TD. Besides, the asymmetric texture intensity of the as-received sheet will be improved by the reorientation induced by deformation twins during the annealing process. Most twins show good thermal stability during the annealing process at 550 degrees C, however, all twins rapidly disappeared at 650 degrees C. The {1012} twins are the most thermally stable during annealing treatment at 600 degrees C. After full recrystallization, the texture induced by matrix reor-ientation maintains, while the texture associated with primary twins recovers.