Demand for Heavy Rare Earths: Compression Before Collapse?

Highlights

• Magnet manufacturers are aggressively reducing dysprosium and terbium loading per motor through advanced formulations and grain-boundary diffusion processes, but this demand-intensity compression doesn't automatically mean lower total heavy rare earth demand.
• Global electrification, AI infrastructure, robotics, defense systems, and offshore wind are expanding rapidly enough that total demand for heavy rare earths may rise even as loading per unit falls, with high-performance applications remaining structurally dependent on Dy/Tb.
• China's dominance may strengthen rather than weaken as sophisticated low-Dy/Tb formulations shift competitive advantage from raw ore ownership toward manufacturing precision, materials science, and industrial ecosystems.

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Why the market is likely entering a long period of “demand-intensity destruction,” not outright demand destruction

When James Litinsky, CEO (opens in a new tab) of MP Materials (opens in a new tab) warned that demand for dysprosium (Dy) and terbium (Tb) could weaken as magnet technology evolves, parts of the heavy rare earth sector in the Rare Earth Exchanges™ network dismissed the comments as self-serving. That reaction misses the more important reality: both sides are partially right.

The key distinction investors must understand is the difference between absolute demand destruction and demand-intensity compression.

The Engineering Trend Is Real

Litinsky is directionally correct that magnet manufacturers are working to aggressively reduce heavy rare-earth loading.

Japanese and European firms are already commercializing lower-Dy/Tb formulations. Proterial (opens in a new tab) has introduced heavy-rare-earth-free NdFeB magnets for certain EV applications. Nidec (opens in a new tab) continues pursuing reduced-heavy and eventually magnet-free motor architectures. Grain-boundary diffusion processes increasingly preserve coercivity while materially lowering Dy/Tb intensity. 

In a special on automobile supply chain for subscribers, Rare Earth Exchanges shows an increasing shift from securing rare earth supply to engineering rare earth dependence out of the system altogether. Across the global EV supply chain, companies such as Nidec (opens in a new tab), ZF Friedrichshafen (opens in a new tab), Valeo (opens in a new tab), Magna International (opens in a new tab), Denso (opens in a new tab), Renault Group (opens in a new tab), and BMW Group (opens in a new tab) are aggressively pursuing magnet-free motors, electrically excited synchronous motors, ferrite-based designs, iron-nitride magnets, and reduced-heavy-rare-earth chemistries to lower exposure to China’s dominance in dysprosium, terbium, and NdFeB magnet production.

The strategic shift reflects a growing realization that the true vulnerability is not ore scarcity, but China’s control over refining, magnet manufacturing, and qualification pathways.

While meaningful large-scale displacement of rare earth magnets likely remains several years away—especially for high-performance EV, aerospace, robotics, and defense systems—the innovation pipeline is far more advanced than many investors assumed. Increasingly, the automotive battlefield is moving from mining toward materials science, motor architecture, recycling, and chemistry innovation aimed at reducing or ultimately eliminating rare earth dependency altogether.

So this is no longer theoretical science-project material. It is entering commercial engineering roadmaps.

But markets often extrapolate too quickly.

Demand Per Motor Falls. Total Demand May Still Rise.

The critical mistake is assuming that lower heavy loading automatically means lower heavy rare-earth demand.

Global electrification, AI infrastructure, robotics, drones, missiles, offshore wind, and defense systems continue expanding rapidly. Even if Dy/Tb loading per motor declines, the total number of motors and high-performance systems may rise far faster.

That matters because high-temperature applications still require heavy rare earths. Extreme-duty EV motors, aerospace systems, military actuators, precision-guided weapons, and offshore wind turbines continue to depend heavily on Dy/Tb-enhanced magnet chemistries.

This suggests a far more nuanced outcome:

• 2026–2030: demand intensity compresses
• Late 2020s–2030s: some civilian applications flatten
• Defense and extreme-performance markets: heavies likely remain structurally critical

In other words, heavies probably do not “collapse.” They gradually become more specialized.

The Strategic Paradox

Ironically, chemistry innovation could strengthen China rather than weaken it.

China still dominates refining, magnet manufacturing, and process engineering. The more sophisticated low-Dy/Tb formulations become, the more manufacturing know-how matters relative to raw ore ownership. This is where Rare Earth Exchanges’ “Great Powers Era 2.0” framework becomes highly relevant: the battlefield is shifting from mining alone toward manufacturing precision, materials science, and industrial ecosystems. The likely winner may not be the company with the largest heavy rare earth deposit. It may be the company best positioned for the next generation of magnet chemistry.