Titanium Additive Manufacturing for Large Aerostructures

GKN Aerospace and the U.S. Air Force Research Laboratory (AFRL) have initiated the $8.4 million TITAN-AM programme to industrialise wire-based additive manufacturing for large titanium aerostructures. The collaboration focuses on scaling Laser Metal Deposition with Wire (LMD-w) for structural aerospace applications.

Context of the Cooperation
GKN Aerospace, a manufacturer of aerostructures and engine components, is collaborating with AFRL, the research and development arm of the U.S. Air Force, to address manufacturing constraints associated with large titanium structures. Conventional subtractive manufacturing of titanium components results in high material waste and extended lead times due to machining from forged billets.

The cooperation is structured to combine AFRL’s research capabilities in aerospace materials and qualification with GKN Aerospace’s experience in industrial-scale additive manufacturing. The objective is to transition LMD-w from a development-stage process to a repeatable, certifiable production method suitable for load-bearing aerostructures.

Technical Solution and Responsibilities
The TITAN-AM programme centres on Laser Metal Deposition with Wire, a directed energy deposition process in which a laser creates a melt pool while titanium wire is fed into the deposition zone. Compared with powder-based additive manufacturing, LMD-w enables higher deposition rates and improved material utilisation, making it suitable for large-format components.

The programme addresses five technical domains:

GKN Aerospace is responsible for process development, manufacturing trials, and system integration, while AFRL supports material validation, modelling frameworks, and qualification methodologies aligned with aerospace standards.

Deployment and Implementation
Programme activities are conducted at GKN Aerospace’s Global Technology Centre in Fort Worth, Texas, which provides infrastructure for large-scale additive manufacturing and integration with digital infrastructure for process monitoring and control.

Implementation includes iterative validation cycles, combining simulation and physical testing. The integration of in-situ monitoring and post-process inspection is intended to ensure traceability and compliance with aerospace certification requirements.

Applications and Use Cases
The primary application areas include defence and commercial aerospace structures such as load-bearing fuselage components, engine mounts, and structural frames. LMD-w is particularly suited to near-net-shape manufacturing of large titanium parts where conventional machining results in high buy-to-fly ratios.

Results and Expected Impact
Industrialisation of LMD-w is expected to reduce material waste through near-net-shape fabrication and improve production efficiency by minimising machining requirements. The approach also enables design optimisation through additive manufacturing, allowing structural reinforcement only where required.

The programme builds on existing serial production of additively manufactured components, including titanium structures used in geared turbofan engines for platforms such as the Airbus A220 and Embraer E195-E2.

Edited by an industrial journalist Sucithra Mani with AI assistance.

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