Mechanical properties of commercial pure titanium processed by ECAP at room temperature using a 120° die

Eight-pass equal channel angular pressing (ECAP) at room temperature was successfully carried out on commercial pure Ti via route B_c, in which the samples were rotated by 90° along the vertical axis in the same direction between two extrusion passes, at an angle φ of 1200°. The microstructure and mechanical properties of the samples after different pressing passes were analyzed and tested. The results showed that after eight-pass ECAP, the tensile strength increased from 407 MPa to 791 MPa, the microhardness increased from 1 588 MPa to 2 641 MPa. the plasticity maintained well, and the elongation reached to 19%.