利用单道次压缩变形 ,研究了变形温度、变形速率和变形程度对一种Ti -IF钢的奥氏体区、铁素体区和两相区的热变形行为的影响 .在奥氏体区和铁素体区变形时 ,随变形温度的降低流变应力增加 ,而在两相区变形时 ,随变形温度的降低流变应力降低 .Ti-IF钢的铁素体动态再结晶受变形温度的影响最大 ,在铁素体变形高温区可以发生动态再结晶 ,铁素体区变形高温区域的变形抗力显著降低 .根据流变应力曲线 ,确定了Ti-IF钢Z -Hollomen参数方程 The effects of deformation temperature, deformation rate and degree of deformation on the hot deformation behavior in austenite, ferrite and two-phase regions of a Ti-IF steel were investigated by single-pass compression deformation. In the austenite region And ferrite zone, the flow stress increases with the decrease of deformation temperature, while the flow stress decreases with the decrease of deformation temperature when the two-phase zone is deformed.The ferrite dynamic recrystallization of Ti-IF steel is influenced by the deformation temperature , The deformation resistance in the high temperature region of the ferrite zone is significantly reduced.According to the flow stress curves, the equation of Z -Hollomen parameter of the Ti-IF steel is determined