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• Impingement angle has highest influence on the wear rates of filler materials. • For alumina, optimized wear rate is better than that from Taguchi method. • For CBPD and silicon carbide, proposed method is equally effective as Taguchi. • The proposed technique is robust against the decision makers' evaluations. In the present work, TOPSIS-based Taguchi has been implemented to study the wear behavior of three filler materials – CBPD, Alumina (Al 2 O 3) and Silicon Carbide (SiC). There are three levels (1,2,3) of five control parameters (Impact velocity (A), Filler content (B), stand-off-distance (C), impingement angle (D) and erodent size (E)). The proposed method includes Fuzzy AHP to determine the weights of the criteria. All the analysis are performed by Closeness Coefficient values obtained from TOPSIS. ANOVA shows that Impingement angle has the highest contribution (28.17%) on wear rates. Optimum factor combination to minimize wear rates comes as A 1 B 2 C 3 D 1 E 2. Optimum wear rates of CBPD and SiC are anticipated as 138.404 mg/kg and 149.940 mg/kg which are same as Taguchi method. For alumina, the proposed method gives better optimum wear rate (112.067 mg/kg) than Taguchi method (113.684 mg/kg). Sensitivity analysis presents that the optimum wear rate and factor level combination are robust. [ABSTRACT FROM AUTHOR]