Numerical simulation technology was used to analyze the extrusion load

temperature field

equivalent strain field and microstructure of TC4 titanium alloy in the process of equal channel angular pressing at different conditions. The results show that with the increase of extrusion temperature

the plasiticity of the TC4 alloy is increased

while the deformation difficulty and the load required for extrusion are reduced. In the process of extrusion speed increasing

the variation of maximum equivalent strain value becomes more sensitive

which is decreased fast with the increase of extrusion speed. Through multi pass extrusion deformation

the maximum equivalent strain is even multiplied

and the accumulated plastic deformation of the specimens is increased

with the significant grain refinement effect. Overall

the grain refining effect is optimized under the extrusion temperature of 350 ℃

extrusion rate of 4 passes and extrusion speed of 0.5 mm/s.