Phase Transitions in Materials offers a fresh viewpoint on phase changes and the thermodynamics of materials, covering the most important phase transitions from classical metallurgy to nanoscience and quantum phase transitions. The book provides clear, concise, and complete explanations that rigorously address transitions from the atomic scale up, essential for understanding modern research in materials science. Topics are grouped according to complexity, ensuring a solid grounding in core topics before delving into more advanced material. Accompanied by numerous end-of-chapter problems, this textbook is ideal for graduate students and researchers in materials science, condensed matter physics, solid state science, and physical chemistry. The content is firmly rooted in the context of modern advances in electronic structure and statistical mechanics, making it a valuable resource developed from classroom teaching.