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The study aims to address the strength-ductility trade-off in additively manufactured titanium structures through a novel dual-titanium architecture.

Strength-ductility synergy mechanism in dual-titanium heterogeneous structures fabricated by multi-material laser powder bed fusion and tailored heat treatments

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The study aims to address the strength-ductility trade-off in additively manufactured titanium structures through a novel dual-titanium architecture.
Engineered dual-titanium architecture using Ti64 and Ti55511 via multi-material laser powder bed fusion (MM-LPBF)
Applied a compatible solution-quench-age heat treatment
Characterized tensile strength and elongation after heat treatment
Analyzed microstructural gradients and deformation behaviors
Achieved ultimate tensile strength of 1143.7 ± 13.2 MPa
Increased elongation of 11.26 ± 0.64%, showing significant improvement over monolithic titanium alloys
Demonstrated strain partitioning and sequential yielding during deformation
Evidence of hetero-deformation induced strengthening through hysteresis loop width data

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Engineering dual-titanium structures improves strength and ductility, suggesting new fabrication strategies for aerospace materials.

Wu et al. (2026) studied this question.

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