Technology thesis · Critical Materials
medium conviction growthAdditive manufacturing
Metal AM is now a qualified production technology in aerospace and defence, but per-part cost, qualification and post-processing - not capability - decide whether it expands beyond complex, low-volume parts.
Position maintained continuously · last reviewed Jun 24, 2026
The thesis
State of the art (2026)
The Wohlers Report 2026 puts global AM revenue at $24.2bn, up from $21.8bn in 2024, but the growth is lopsided: materials and services expand while machine-maker revenue falls and Asia, led by China, drives most of the gain. Production demand is concentrated in regulated metal applications. VulcanForms, fresh from a $220m round in January 2026, runs its Devens VulcanOne foundry to supply F-35 and Patriot programmes, and FAA/EASA guidance now admits metal AM parts into type-certificated aircraft given full traceability. The bottleneck is no longer whether AM works but per-part cost, qualification and post-processing versus casting and CNC. Consolidation continues after the collapsed Stratasys-Desktop Metal merger and Velo3D being taken majority-private.
Core thesis
Chuck Hull invented stereolithography in 1984. Today metal AM produces jet-engine fuel nozzles (GE Aerospace), rocket-engine components (SpaceX Raptor, Rocket Lab Rutherford) and orthopaedic implants in qualified production. The technology has crossed from prototyping to production for complex, low-volume parts; the open question is per-part cost, qualification and post-processing versus casting and CNC, not capability. In metal production AM the names that matter now are EOS, Nikon SLM, GE Additive (Colibrium) and the integrated digital-manufacturing entrant VulcanForms, whose Devens foundry supplies US defence programmes after a $220m round in January 2026. Relativity Space is building the largest metal printers to make most of its Terran R rocket, targeting a first launch in late 2026.
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Signal stack
Evidence stacked leading → lagging
Technology-native KPIs
Metrics that predict trajectory, tracked over time
Landscape map
Who builds what — and who depends on whom
Catalyst calendar
Dated events that will move the position
Technology roadmap
Milestones on the path to maturity
Watchlists
Companies, people and papers — each with a remove-by condition
Decision frameworks
The same call, framed for your desk
Thesis changelog
When our view changed, and why
Change our mind
2 disconfirming conditions
The rest is inside
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The full signal stack, technology-native KPIs tracked over time, the landscape of who depends on whom, the dated catalyst calendar, decision frameworks for every desk, live watchlists and the changelog of every time our call on Additive manufacturing has changed — all live inside CanaryIQ.