The book "Introduction to Materials Science for Engineers" is aimed at first-year students in materials science and engineering, addressing the needs of departments of materials science, mechanical engineering, civil engineering, and general engineering. It provides a balanced and modern approach across the entire spectrum of engineering materials, influencing all their physical properties and applications. All major categories of materials are examined, with detailed analyses of a wide range of new materials with advanced applications. The 9th Edition has been revised to reflect recent data and trends, including updated illustrations of crystal structures created computationally and new end-of-chapter problems.