Material fatigue refers to the progressive structural degradation of a material when subjected to cyclic stresses, even if these stresses remain below the material's yield or ultimate tensile strength. This failure mode involves the initiation and subsequent propagation of micro-cracks over numerous load cycles, eventually resulting in sudden, catastrophic failure. The relationship between the stress amplitude and the number of cycles required to cause failure is a primary focus of mechanical analysis, often leading to the determination of endurance limits for specific material types. Engineering practices designed to mitigate fatigue failure involve selecting materials with favorable crack resistance, designing component geometries that minimize stress concentrations, and evaluating the influence of environmental factors such as corrosion on the overall service lifespan of the structure.