The thermal deformation behavior of TC4 titanium alloy was studied by using UTM 5504X electronic universal testing machine at 650 – 850 ℃ and strain rate 10

–3

– 1 s

–1

. The modified Misiolek hardening model was established and the flow stress of the material under different deformation conditions can be predicted accurately by this model. At the same time

the finite element model of high temperature twist-bend forming of TC4 titanium alloy hollow blade was established. Considering the simulation results

the optimal process parameters of twist-bend forming of TC4 titanium alloy hollow blade were determined as follows: twist forming tempera

ture 750 ℃

twist forming section 550 mm and twist angular velocity 1.938°/min. The result is found that the content of α phase decreases and the content of β phase continues to increase under the condition of high temperature deformation

and the material has high elongation and plastic forming property. Finally

the hollow blade prepared by bending and torsional forming has a smooth overall transition

no surface defects and has good forming quality. The research results can provide guidance for the mass manufacturing of TC4 titanium alloy wide-string hollow fan blade.