The Light Metals symposia at the TMS Annual Meeting & Exhibition present the most recent developments, discoveries, and practices in primary aluminum science and technology. The annual Light Metals volume has become the definitive reference in the field of aluminum production and related light metal technologies. The 2025 collection includes contributions from the following symposia: Alumina & Bauxite Aluminum Alloys: Development and Manufacturing Aluminum Reduction Technology Decarbonization and Sustainability in Aluminum Primary Processing: Joint Session of Aluminum Reduction, Electrode Technology, and REWAS 2025 Electrode Technology for Aluminum Production Melt Processing, Casting and Recycling Recycling and Sustainability in Cast Shop Technology: Joint Session with REWAS 2025 Scandium Extraction and Use in Aluminum Alloys.