A dynamic recrystallization (DRX) cellular automaton (CA) model that can mark the microstructure with DRX circle was developed.The effects of initial grain size on the stress-strain curve,mean grain size and DRX fraction were mainly investigated,and the simulated results were compared with those obtained from previous researches.The results show that the shape of the stress-strain curve is sensitive,while the stress and mean grain size at the steady state are insensitive to the initial grain size.The transition from a multiple-peak stress-strain curve to a single-peak one can be explained by variations in DRX circle fraction,and the initial grain size to make this transition is between 70 and 80 μm.