The bronze-based composite materials containing 5, 10 and 15 wt. % fly ash were prepared by using spark plasma sintering method carried out under a pressure of 35 MPa, at 750, 800 and 850 °C. Sintering temperature and fly ash reinforcement ratio were considered as input parameters; the transverse rupture strength (TRS) was considered as output parameter. Experiments were designed according to Taguchi L9 orthogonal array. Signal to noise (S/N) ratio was computed to determine the optimum process parameters. ANOVA was performed to determine the importance of the input parameters for the process performance. Moreover, the lineer and quadratic regression equations were developed for predicting the performance parameters by using regression analysis. As a result of Taguchi analysis, it was found the optimum results for TRS in fly ash reinforcement of 5% and sintering temperature of 850°C. The obtained results indicate that the sintering temperature was found to be the dominant factor among controllable factors. However, the fly ash reinforcement ratio showed an insignificant effect.