The edition contains peer-reviewed papers presented at the 12th International Conference on Materials Science (ICMS 2024), held in Ulaanbaatar, Mongolia, on October 1-3, 2024. The conference's main objective was to bring together scientists from around the world working in the field of materials science to exchange ideas, discuss recent research advancements in this area, and provide a platform for future scientific cooperation. This edition focuses on studying the structure, properties, and applications of new materials, as well as methods of materials characterisation.