This book comprehensively and systematically discusses in situ aluminum matrix composites, from their system design, material development, and preparation technology, to their solidification structure, plastic processing, and properties. As a new type of metal matrix composite, it not only provides a technical framework for the low-cost, large-scale development of high-performance compliant materials, but also provides important technical support for the promotion of the aluminum industry. The book appeals to researchers and industrial practitioners in the area of materials development for in situ aluminum matrix composites.