[en] In order to investigate the effect of synthesis methods on tribological behaviors of M50 matrix self-lubricating composites, M50-5wt%Ag-10wt%Ti₃SiC₂ self-lubricating composites (MAT) are prepared by spark plasma sintering (SPS) (MATS) and selective laser melting (SLM) (MATM) respectively. For comparison purposes, M50 steel samples are prepared by SPS (MS) and SLM (MM). The dry tribological behaviors of MS, MM, MATS and MATM against Si₃N₄ ceramic balls are investigated at 0.2 m s⁻¹-15 N from 25 to 450 °C. The results show that Ag, Ti₃SiC₂, TiC and Ti-Si-oxides can improve the tribological performance of MAT. The anti-friction and wear-resistant performance of MATM is better than that of MATS due to the fine structure of MATM. (paper)