Materials Science in Engineering: Understanding the Properties of Matter offers a deep dive into the essential principles that govern the behavior of materials. This book is designed to equip readers with the knowledge required to understand the intricate relationships between the atomic structure, processing techniques, and material properties. Covering a broad range of materials, including metals, polymers, ceramics, and composites, it highlights how their distinct characteristics—such as strength, ductility, conductivity, and thermal stability—are influenced by their molecular makeup. The book introduces critical topics like crystal structures, bonding, and defects, exploring how these atomic-level details translate into real-world material behavior. In addition, it covers the impact of processing techniques like heat treatment, alloying, and surface modification on material performance. Practical applications are woven throughout the text, linking theoretical concepts with their use in industries such as aerospace, electronics, and construction. By providing both a solid theoretical foundation and a practical understanding, this book serves as an invaluable resource for students, engineers, and researchers looking to understand and apply the science of materials in engineering.