2021 4th International Conference on Nanomaterials, Materials and Manufacturing Engineering (ICNMM 2021) will be held in Nanjing, China during August 14-16, 2021. ICNMM will bring together the top researchers from Asian Pacific nations, North America, Europe and around the world to exchange their research results and address open issues in biomaterials, biomedical manufacturing, casting and solidification, characterisation, coatings and surface engineering, composite materials, etc. It is one of the leading international conferences for presenting novel and fundamental advances in the fields of nanomaterials, materials and manufacturing engineering.