The equal channel angular pressing (ECAP) process of commercial pure titanium (CP-Ti) at room temperature was simulated by software Deform-3D V6.1. A single-pass ECAP at room temperature was successfully carried out in CP-Ti fabricated by powder metallurgy, using the die with a internal angle φ of 90° and the outer curvature angle Ψ of 60°. The microstructures and properties of different parts of the sample after extrusion were studied, and the influence of ECAP on the densification of the CP-Ti was explored. Numerical simulation results show that deformation is mainly distributed in the central region of workpiece, and the maximum equivalent strain in the angular region of the channel. Experimental results show that single-pass ECAP deformation is mainly concentrated in the longitudinal section parallel to the extrusion direction in the central region. The equiaxed grains are broken into lath-like, and there are a large number of twins grains. The microhardness of the specimen increases from 1450 MPa to 2244 MPa. Round pores in the specimen are flat tended and welded. Therefore, the material density can be improved by ECAP deformation.