<p>Titanium alloys are widely used for compressor discs and blades in aero engines due to their excellent strength-to-weight ratio. As (Ti6Al4V) is employed in both compressor discs and blades of modern aerospace engines, contact between self-mated materials can lead to induced fretting wear in the contact area. Therefore, it is essential to investigate the fretting wear behavior of these self-mated materials. In this study, we adopted a ball-on-flat bed contact geometry and utilized self-mated TC4 ball and Si₃N₄ ball as friction pair materials to examine the wear characteristics and wear surface microstructure of the (Ti6Al4V) alloy at room temperature. The results suggested that while employing Si₃N₄ ball slider, the (Ti6Al4V) alloy average friction coefficients were higher than those of the TC4 ball sliders. The cross-sectional view of wear scars indicates that the (Ti6Al4V) alloy, when rubbed by a TC4 ball slider, showed fewer cracks compared to the Si₃N₄ ball slider. The possible wear mechanism of the (Ti6Al4V) alloy with Si₃N₄ ball slider dominates severe abrasive wear, and oxidative wear. With the TC4 ball slider, however, slight adhesive wear, and severe oxidative wear processes were more common. The fretting loop transitions from the gross slip regime to the partial slip regime as the applied load are increased for each slider. This work reveals the various tribological mechanisms of friction pairs and offers experimental and theoretical references for the ideal selection of friction pair materials in real-world fretting circumstances.</p>