This book is a collection of the selected peer-reviewed papers presented at the 2023 4th Research, Invention, and Innovation Congress (RI2C), organized by the Science and Technology Research Institute (STRI), King Mongkut's University of Technology North Bangkok, during August 24-25, 2023. The RI2C 2023 was aimed at highlighting and sharing new knowledge as well as contributing to the Innovation for Better Life. The selected articles delve into various facets of materials science and technology and present the results of research dedicated to, amongst others, sustainable materials, materials for biomedical applications, functional materials, corrosion and oxidation processes as well as engineering and mechanics of materials. The insights presented in this edition promise to provide valuable knowledge and perspectives to professionals within these disciplines and will be helpful to engineers and researchers involved in materials, biomedical engineering, and eco-friendly building materials fields of science.