Si 3N 4 ceramics suffer from high wear rates in high-temperature tribological applications due to mechanical degradation and abrasive damage from microfractures. This study shifts focus from compositional adjustments to microstructural design, systematically comparing the tribological performance of Si 3N 4-TiN composites with dispersed versus three-dimensionally continuous TiN networks across RT–900°C under identical conditions. Results indicate that the network-structured material consistently maintains a lower wear rate within all temperature ranges, and achieves higher relative density (>98%) and superior toughness (6.5–7.9   MPa·m 1/2). The superior crack-propagation resistance and optimized load transfer pathway of the network structure effectively reduced abrasive wear lower 600°C. At 900℃, interconnected TiN channels accelerate oxygen diffusion, enabling rapid formation of protective SiO 2-TiO 2 tribofilms that reduce wear rates by one order compared to dispersed-structured sample. This study validates the importance of regulating microstructure in reducing wear in ceramic materials, offering a universal strategy toward damage tolerance in extreme environments.