The comparative analysis of the two hybrid composites, obtained by compocasting process, based on A356 and ZA-27 alloys reinforced with 10 wt. % SiC 0, 1 3 graphite (Gr) is presented. Optimisation their tribological behaviour was performed Taguchi method artificial neural network (ANN). Tribological tests were a block-on-disk tribometer, at three sliding speeds, normal loads distance 600 m, w...