<p>Triply periodic minimal surface (TPMS) structures, characterized by repeating surface-based unit cells with a high surface area-to-volume ratio, offer significant potential for engineering applications. However, limited research has explored their thermal and acoustic properties. This study investigates the thermal dissipation and sound absorption performance of TPMS structures to identify optimal configurations for heat dissipation and sound absorption, from which hybrid TPMS structures are developed and optimized. Forced convection thermal dissipation was analyzed for various TPMS types, including Gyroid, Diamond, Lidinoid, and Split-P, across different offset thicknesses. Additionally, sound absorption coefficients were measured using a dual-microphone experimental setup. The thermal analysis identified the Split-P structure as having the lowest maximum temperature, while acoustic tests revealed that the Diamond structure exhibited the highest sound absorption coefficient. Based on these findings, a hybrid TPMS that integrated Split-P and Diamond structures was developed. This hybrid design achieved enhanced thermal dissipation and improved sound absorption, thereby demonstrating superior performance and potential effectiveness for multifunctional applications.</p>