This book focuses on selected aspects of the current and upcoming trends in mechanical engineering and applied composite materials. In detail, the included scientific papers present the study of applied composite materials to advance the research and application of mechanical behaviors, manufacturing techniques, and structural applications. These cutting-edge research papers help in developing innovative composite solutions, and address challenges in industries such as aerospace, automotive, and civil engineering. The collaboration between mechanical engineering and applied composite materials in the research leads to advancements in material science, manufacturing methods, and structural design principles. This book is the documentation of the 6th International Conference on Mechanical Engineering and Applied Composite Materials (MEACM2023), which took place in Sanya, China, on December 28-29, 2023.