An extrusion process of Ti6Al4V titanium alloy at 900℃ under equal-channel angular pressing (ECAP) at a 90° angle was numerically simulated at a different extrusion speed in the range of 0~5 mm/s by using Deform-3D finite element software. The simulation results show that at the same extrusion speed, the rate of temperature decrease after the sample passes through the corner is reduced; the higher the extrusion speed, the lower the load required for the extrusion process, the smaller the strain accumulation, the lower the equivalent stress, the less the stress concentration phenomenon, and the smaller the temperature drop of the sample in the extrusion process. In this study, the extrusion speed was selected as 5 mm/s.