Thermal simulation test for 0. 045Ti-0. 003 C Ti-IF steel with strain 0 ~ 0. 7 and strain rate 1 ~ 70 s
-1
at 700 ~950℃ has been carried out by thermecmastor-Z simulation mat'hine to analyze the effect of temperature
strain and strain rate on deformation resistance. The prediction model of tieformation resistance of the Ti-IF steel at 800 - 875℃ was obtained by BP neural net calculation method. With comparison between model predicted value and actual measured value
it indicated that the relative error of deformation resistance was less than 4. 0% 。