The โ21st Symposium on Compositesโ covered a wide range of composite-related topics including polymers, metal and ceramic composites, hybrid structures and laminates, coatings, manufacturing technologies, testing and simulation, structural health monitoring, biocomposites and recycling technologies. This conference was organized by โGemeinschaftsausschuss Verbundwerkstoffe (GAV)โ within โDeutsche Gesellschafft fรผr Materialkunde e.V. (DGM)โ in cooperation with the University of Bremen. The attendants from academia and industry presented and discussed their latest research results and developments related to different kinds of modern composites.