Greatly important thing aims the duplicate of experiments, about machining to achieve the required surface roughness and flank wear with the optimal cutting parameters. For this reason, the RSM optimization seems to be a benefit technique. Therefore, the goal is to minimize surface roughness (Ra) and flank wear (VB). Fig. 19 and Fig. 20 shows the response optimization for surface roughness and flank wear for Al2O3+TiC insert tool TiN+AlCrN insert tool.