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In the current work, the effects of initial deformation temperature and strain rate on flow behavior and microstructure of boron-alloyed steel after non-isothermal deformation were investigated. Based on the stress-strain curve obtained in the non-isothermal tensile experiment with a Gleeble 3500 system, finite element software was used to carry out the thermal mechanical coupled simulation of hot stamping process, which was further validated by hot stamping experiment of a V-channel part. The results indicate that the forming force was higher than that of the isothermal deformation. It was also observed that the initial stamping temperature should be above 750 °C, and the holding and quenching time should be up to 15 s in hot stamping process according to finite element (FE) simulation. Finally, the results obtained from hot stamping experiments are in good consistency with the simulation; thus, it reveals that the FE modeling of non-isothermal hot stamping process is reliable. [ABSTRACT FROM AUTHOR]