Multifunctional and Smart Materials presents advancements in multifunctional, sustainable, and smart materials that enhance performance and improve processes across a wide range of engineering fields, including renewable energy, automotive, and aerospace. It provides a comprehensive overview of material design, properties, and emerging applications. Offering a deep dive into sustainable materials, this book addresses how eco-friendly, recyclable, and renewable materials are reducing environmental impact and contributing to a circular economy. It explores advanced materials that perform multiple functions, such as power generation, energy storage, and structural integrity. This book highlights recent developments in materials research from 3D-printed materials for enhanced efficiency and waste reduction in manufacturing processes to smart coatings for multifunctional protection against environmental and operational stresses. This book is intended for researchers and graduate students studying advanced materials and multidisciplinary engineering applications for intelligent, eco-friendly, and multipurpose materials.