This course is designed to provide fundamental understanding of fiber-reinforced composites (FRPs) and emerging nanocomposites technologies. The topics include constituent materials, microstructure-property relationships, fabrication and processing techniques, fundamental mechanics of stress transfer, lamination theory and failure mechanisms and fracture of FRPs in the first part. The topics in the second part include synthesis of nanoscale reinforcements, fabrication and processing techniques of nanocomposites; dispersion and functionalization of nanoreinforcements; interfacial adhesion; mechanical and functional properties of nanocomposites, and their design and applications.