Alcoa and the governments of Australia, Japan, and the United States have reached a final investment decision to develop a gallium production plant at the company’s Wagerup alumina refinery in Western Australia, marking a new effort to diversify global supplies of the critical mineral.

The facility will be built and operated by Alcoa, drawing on its alumina refining and mineral processing expertise. Once operational, the plant is expected to provide a new source of gallium, a material used in semiconductors, power electronics and defense technologies, helping reduce reliance on the highly concentrated global supply chain.

Construction is expected to begin after final site preparations are completed. Alcoa said its participation in the project, including its role as construction and operating manager, is not expected to have a material impact on its financial position or operating results.

Chief Executive Officer William Oplinger said the investment reflects a joint commitment by governments and industry to strengthen critical mineral supply chains while highlighting the strategic importance of Western Australia in supplying materials essential to advanced technologies.

The project comes as the United States, Japan, and Australia deepen cooperation to secure supplies of critical minerals amid growing geopolitical concerns over China’s dominance in processing and production of materials such as gallium. China accounts for the vast majority of global primary gallium output and has tightened export controls on the metal in recent years, prompting governments and manufacturers to seek alternative sources.

The Wagerup project leverages gallium extraction from the alumina refining process, enabling production alongside existing operations rather than developing a standalone mine. The initiative aligns with broader efforts by Western allies to build more resilient supply chains for minerals considered essential to the energy transition, advanced manufacturing and national security.