This study focuses on ABS matrix composites containing a hybrid filler system composed of copper fibers and tin powder, with a total filler content of 25% by volume. The composites were specifically engineered to enable laser-induced ablation of the polymer matrix on one side, simultaneously exposing copper fibers and activating tin for localized soldering. This configuration is intended to facilitate subsequent selective electroplating. The research investigates the effects of ageing degradation processes on the mechanical properties of these composites. The volume fraction of tin powder was varied (2.5%, 5%, 7.5%, 10%, and 12.5%), with the remaining filler volume consisting of copper fibers. To simulate real-life service conditions, the samples underwent accelerated thermal ageing. Mechanical performance was evaluated using dynamic mechanical analysis (DMA) and tensile testing. The results demonstrated that tin powder content significantly influenced changes in Young’s modulus and mechanical loss factor with temperature, as well as reductions in tensile strength after ageing. Increasing the tin powder fraction improved the composite’s thermomechanical stability, though it simultaneously reduced long-term mechanical strength. These findings deepen the understanding of ageing-related degradation in metal-reinforced polymer composites and support the optimization of their composition for advanced applications such as laser-assisted selective metallization.

Acknowledgement: Research funded by the National Science Centre, Poland, grant no.:2022/47/B/ST5/02178 (UMO-2022/47/B/ST5/02178).