This collection contains peer-reviewed selected papers from the 18th International Symposium on Eco-Materials Processing and Design (18th ISEPD 2017, February 17-20, 2017, Okinawa, Japan) and covers wide range of research results in the area of materials development and materials processing technologies, including environmentally-friendly and energy saving processes, advanced nano-, hybrid-, porous- and biomaterials, functional ceramics, materials for fuel cells as well as for catalysis and adsorption processes, steel, alloys, electrical insulating materials, etc.