Now a days industries are looking to manufacture components that are having a good surface texture and should have more life to be in working condition. The automobile industry and aerospace industries are looking for new materials and methods to increase the good surface texture with the optimum resource utilization to prepare the components. To achieve this it is essential to go for CNC machines, new methods, and materials. At present industries are using alloys and composite materials widely to manufacture their components. To meet the needs of industries it is essential to study the surface roughness, and material removal rate of new materials, as these output responses are vital for materials to use in industries. In this study, my work is on composites Al6061/SiC/Gr (HAMMC). To machine the samples of composite, CNC turning operation using of carbide single point cutting tool. The objective is to find the influence of machining parameters on surface roughness, material removal rate, and sustain of material under hot working conditions. By using, the Taguchi technique, some experiments are designed based on input parameters and level of parameters. Grey Relational Analysis was also used to optimize the parameters for the multi-performance characteristics of minimum surface roughness and maximum material removal rate in machining.