Metal Fatigue Testing and Analysis: Theory and Practice equips readers with the theoretical knowledge and practical skills required to design durable metallic structures and components. The book thoroughly reviews fatigue and reliability theories for product durability designs, analyses, and validations, highlighting the latest advances and identifying key challenges. The book is structured to guide readers in how to design targets from mission profile data, which is crucial in ensuring that structures (vehicle, systems, and components) meet the specific requirements of their applications. Insight is provided into how to analyze and design structures based on established targets, with practical insights and methodologies for structure designs provided, emphasizing durability and fatigue resistance. Readers are guided through the development of validation tests to assess the durability of their designs, with emphasis placed on the importance of implementing reliability demonstration tests to ensure that test structures meet the design targets. The approach of the book allows for a progressive learning experience, with each chapter building upon the concepts and techniques introduced in the preceding ones, ultimately leading to a comprehensive understanding of fatigue analysis and mirroring how fatigue analysis is approached in practice.