Composite metal foamsComposite Metal Foam (CMF) are promising for applications requiring lightweight materials with high strength and impact resistance, such as aerospace, automotive, and military systems. While the mechanical propertiesMechanical properties of CMFs at room temperatureTemperature are well-documented, their behavior under elevated temperaturesTemperature remains relatively unexplored. This study delves into the mechanical performance of CMFs at temperaturesTemperature ranging from 25 to 800 °C through quasi-static compression tests and in-situ scanning electron microscopyScanning electron microscopy (SEM) analysis. The CMFs were fabricated using hollow stainless steel spheres embedded in a 316L316L stainless steelStainless steel matrix created via powder metallurgy. The results reveal a stable mechanical performance at room temperatureTemperature, with a gradual degradation and early plastic deformation at intermediate temperaturesTemperature (400 and 600 °C) due to thermal softening. At higher temperaturesTemperature (700 and 800 °C), CMFs exhibit failure driven by grain boundary void formation and oxidation. However, despite these challenges, CMF retains a significant capacity for energy absorptionEnergy absorption even at elevated temperaturesTemperature. This underscores their potential in applications that require controlled deformation and energy dissipation under high-temperatureTemperature conditions.