<p>Excessive temperature rise in automotive brake discs during high-load braking conditions can lead to brake fade, accelerated wear, and reduced friction stability. In this study, the feasibility of integrating metal-type phase-change materials (MTPCMs) into ventilated brake discs is investigated as a latent heat-assisted thermal management strategy. A simplified analytical energy balance model is developed to analyze the thermal behavior of a conventional air-cooled brake disc and MTPCM-filled configurations under uniform heating conditions. The energy–temperature responses of brake discs incorporating aluminum, zinc, tin, and bismuth as MTPCMs are evaluated and compared with a reference configuration. The results reveal that MTPCM integration introduces distinct temperature stabilization regions associated with latent heat absorption during the solid–liquid phase transition. Compared to the conventional brake disc, MTPCM-filled configurations require significantly higher thermal energy to reach critical operating temperatures. Among the investigated materials, aluminum and zinc exhibit the most pronounced thermal buffering effect due to their relatively high latent heat of fusion and favorable thermophysical properties. Although the present analysis neglects convective and radiative heat losses and assumes steady heating conditions, the findings provide valuable first-order insights into the potential of MTPCM-filled brake discs for enhancing thermal energy storage capacity and delaying excessive temperature rise. The proposed approach establishes a foundation for future experimental validation and advanced transient simulations under realistic braking scenarios.</p>