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The tribological behavior of chitosan (CS)‐filled polylactic acid (PLA)/basalt fiber (BF)‐reinforced (PBC) composites of three different volume fraction were studied using pin‐on‐disk wear tester under dry sliding conditions. The worn‐out surfaces of the composites were examined by scanning electron microscope (SEM), and wear mechanisms dominating each sliding conditions were classified. The wear maps were used to study the influence of sliding velocity and normal force over the coefficient of friction (μ), contact temperature (CT), and wear rate (WR). A wear mechanism map was developed by using fuzzy C‐means clustering algorithm method (FCM) to study the wear mechanism of composites. Results showed that increased weight percentage of basalt and CS in PLA played a vital role in increasing the wear resistance.