High-Performance Polymer Hybrid-Fiber Composites explores the latest advancements in this important research field. The book provides a comprehensive overview of their design, manufacturing, properties, and applications. It aims to offer a detailed understanding of hybrid composites, which combine two or more types of fibers within a polymer matrix to enhance mechanical, thermal, and environmental performance. The book begins with the fundamental principles of polymer composites and the importance of hybridization. It discusses various fibers, including carbon, glass, aramid, and natural fibers, and how their combinations can be optimized for specific uses. Key topics include materials design and fabrication, mechanical and thermal properties, matrices and fibers and applications. Sustainability and recycling are also discussed in detail as well as future trends. The book will serve as an essential resource for materials scientists, engineers, researchers, and postgraduate students, providing both theoretical knowledge and practical insights into the development and application of high-performance hybrid polymer composites.