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| REalloys |
Heavy rare earth supply has moved further into the US defense priority list after REalloys received a memorandum from the Department of Defense highlighting the need to secure domestic production of critical heavy rare earth elements. The document specifically identified dysprosium and terbium as the most critical and high-value materials.
The signal is important because heavy rare earth supply remains one of the weakest points in western permanent magnet value chains. Dysprosium and terbium are essential for high-performance magnets that must operate under heat, stress and demanding defense conditions.
REalloys said the Department of Defense is treating heavy rare earths as a national security priority. The company also said Washington is renewing support through financial investment, strategic policy and public-private partnerships.
The company is now expanding its North American metallisation platform to produce defense-grade dysprosium and terbium at commercial scale. That step targets one of the most important bottlenecks between rare earth separation and magnet manufacturing.
Dysprosium and Terbium Become Defense-Critical Materials
Dysprosium and terbium are not large-volume rare earths, but their industrial importance is high. They help improve the thermal stability and performance of neodymium-iron-boron magnets used in advanced motors, actuators, sensors and defense systems.
This makes them strategically different from ordinary raw materials. Even small shortages can affect high-value manufacturing programmes if qualified metal, alloy or magnet feedstock is unavailable.
The US defense focus reflects a wider shift in rare earth policy. Governments are no longer concerned only with mining rare earth ore. They are increasingly focused on separated oxides, metals, alloys and magnet-ready materials.
That is where heavy rare earth supply becomes difficult. China remains dominant across heavy rare earth processing and magnet material production, leaving western defense and industrial users exposed to export controls and licensing risk.
REalloys’ focus on defense-grade dysprosium and terbium is therefore strategically relevant. It addresses the material form that downstream manufacturers need, not only the upstream resource question.
Metallisation Capacity Is the Midstream Bottleneck
REalloys is expanding its North American metallisation platform with support from a long-term offtake agreement with the Saskatchewan Research Council facility in Canada. The agreement can provide feedstock sufficient to produce up to 530 t/yr of rare earth metals.
This feedstock link is important because rare earth metal production requires reliable separated material, technical process control and customer qualification. Without metallisation, separated rare earth oxides cannot fully support magnet and defense supply chains.
The North American rare earth supply chain still has several missing links. Mining and separation projects are advancing, but metal-making, alloy production and magnet manufacturing capacity remain limited.
REalloys’ platform could help close part of that gap. Producing dysprosium and terbium metal at commercial scale would give defense and magnet customers a more secure regional source of high-value heavy rare earth inputs.
The larger implication is clear. Western rare earth resilience will depend on building each stage of the chain, from feedstock to separated oxides, metals, alloys and final magnets.
The Metalnomist Commentary
The REalloys announcement shows that heavy rare earth strategy is moving beyond resource ownership into usable metal production. For defense supply chains, dysprosium and terbium security will depend on metallisation capacity, not only rare earth mining.





















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