The upstream materials layer - titanium, superalloy and special-alloy forgings and castings that every structural, engine and landing-gear component downstream is machined from.
Why it matters
Nothing else in the value chain can be built without certified aerospace-grade forgings and castings, so capacity and quality here gate everything downstream.
Where the value pool sits
Forging and casting specialists capture long-cycle, qualification-locked contracts with global OEMs, since re-qualifying a new supplier for flight-critical metal is slow and expensive.
Key drivers
Global OEM build-rate ramps (Airbus, Boeing, engine makers)