Mechanics of Composite, Hybrid, and Multifunctional Materials, Volume 6 of the Proceedings of the 2017 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the sixth volume of nine from the Conference, brings together contributions to this important area of research and engineering.  The collection presents early findings and case studies on a wide range of areas, including:  Nano & Particulate Composites Recycled Constituent Composites Hybrid Composites Multifunctional Materials Fracture & Fatigue of Composites Novel Developments in Composites Mechanics of Composites