Abstract <p>This study presents a comprehensive investigation into the microstructural evolution and phase transformation behavior of Cu–30 wt % Sn alloy fabricated via powder metallurgy. The alloy was synthesized through cold compaction followed by sintering under a controlled argon atmosphere. Microstructural features and elemental distributions were characterized using scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS), while phase constituents were identified through X-ray diffraction (XRD). Differential scanning calorimetry (DSC) analyses were conducted under various heating and cooling rates to evaluate the thermal response and phase transition kinetics of the alloy. The results revealed a dual-phase microstructure composed predominantly of α (Cu-rich) and ε (intermetallic) phases. DSC data indicated two distinct transformation peaks during both heating and cooling cycles, showing thermal hysteresis and sensitivity to the applied heating/cooling rates. These findings contribute to the understanding of phase stability and thermal behavior in high-Sn bronze alloys, offering implications for their use in damping, bearing, and structural applications.</p>