Mechanics of  Composite, Hybrid, and Multifunctional Materials , Volume 5 of the  Proceedings of the 2023 SEM Annual Conference & Exposition on Experimental and Applied Mechanics , the fifth volume of five 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: Advances in Composites Recycled Composites Tunable Materials Damage Detection in Composites Multifunctional Composites Fracture and Failure in Complex Materials