Fatigue strength refers to the maximum stress a material can withstand for a specified number of cycles without failing. It is a critical property in engineering, especially for components subjected to repeated loading, such as in automotive and aerospace applications. Understanding fatigue strength helps engineers design safer and more reliable structures by predicting how materials will behave over time under cyclic stress. The fatigue strength of a material is influenced by various factors, including its composition, microstructure, and environmental conditions. Engineers often use fatigue testing to determine this property, allowing them to assess the durability of materials and ensure they meet safety standards in real-world applications.