Dual phase structure formed by partial reversion of cold-deformed martensite

► We focused on the potential of martensite as starting structure of DP steel. ► The excellent strength-elongation balance was obtained in the steel produced from undeformed martensite, while higher strength was realized in the steel with prior deformation. ► With increasing the rolling reduction and the heating rates, the recrystallized ferrite matrix becomes finer and the tensile strength is more increased. ► The competition between recrystallization and reversion during continuous heating could be predicted by the modified tempering parameter.