The conference committee welcome you to attend the 4th World Symposium on Materials Sciences and Engineering (SMSE 2025). The congress will be held during Dec. 2nd-4th, 2025 in Singapore, with hybrid format. SMSE 2025 includes plenary forum, 17 breakout sessions, as well as poster exhibition in the three-day scientific program. The main topics include Intelligent Materials and Intelligent Systems, Electronic Materials and Applications, Nanomaterials and Nanotechnology, Composite Materials and Fiber Composites, Biomaterials and Biomedical Manufacturing, Carbon and Graphene Technologies, etc. SMSE 2025 brings together the best scientists from universities, research institutes and the materials industry worldwide to share exciting results and to build new collaborations. Great ideas and top discoveries from participants will help develop novel aspects of materials development. We hope you can join your peers in a highly interesting and engaging hybrid event with online and offline. Your presence and deliberation will make this congress remarkably successful.