In this study, the influence of operating parameters on the mechanical properties of Dual Phase (DP) steels was investigated, using response surface methodology (RSM) to develop a prediction model. In developing the model, temperature and holding time were considered as the model variables. To establish this fact, an experiment based on statistical four-level two factorial design method was carried out. Based on the statistical analysis, surface hardness (SH) shows a correlation coefficient of R2= 0.9607 while Ultimate Tensile strength (UTS) gave R2= 0.9297, this suggests that the proposed quadratic model is suitable for use. The optimum operating parameters were predicted using the user-defined design (UDD) under RSM and the result was confirmed through experiments, which predict at a temperature (T) of 800oC and holding time (HT) of 60 minutes, hardness value was given as 157.798HV and UTS as 553.648Mpa. This result indicates that RSM is a suitable method to optimize the process variables for mechanical properties of DP steels.