Titanium Alloy Additive Manufacturing Speeds Up Automotive Adoption: Xiaomi Auto Completes Closed-Loop Layout Of High-End Core Materials

The second half of the new energy vehicle competition hinges on lightweight new materials and advanced manufacturing processes. Thanks to falling costs and maturing technologies, selective laser melting (SLM) 3D printing for titanium alloys is being adopted by mass-market electric vehicles. By investing in titanium alloy  additive manufacturing, Xiaomi Auto has built a diversified material technology system covering high-strength steel, aluminum alloy die-casting and titanium alloy additive manufacturing.

1. Inherent Advantages of Titanium Alloys

• Titanium alloys feature high specific strength, excellent fatigue resistance, corrosion resistance and high-temperature tolerance, delivering outstanding lightweighting effects. For equivalent structural strength, titanium components weigh over 40% less than steel counterparts and 20% less than aluminum alternatives. Reducing unsprung mass improves energy efficiency, driving range and vehicle handling.
• Their major drawback lies in conventional forging and cutting processes: complex forming, high material waste and excessive production costs, which have long prevented mass automotive deployment.

2. Additive Manufacturing Breaks Process Barriers

Metal 3D printing eliminates the need for molds and enables integrated consolidation of multiple discrete parts. Combined with topological optimization, it produces hollow lightweight structures and drastically cuts material waste. The technology is applicable to chassis brackets, brake calipers, irregular thermal management components and more.

3. Commercialization Across the Industry

Titanium alloy 3D printing was once exclusive to high-end supercars. Today, falling prices of domestically produced titanium powder, higher printing equipment efficiency and improved process stability have laid the groundwork for large-scale adoption in mass-market electric vehicles.

1. Establishing a Full-Vehicle Material Ecosystem

Seizing the industry's technological transformation opportunity, Xiaomi Auto pursues full-stack independent R&D of materials. The SU7 series adopts differentiated material solutions: self-developed Xiaomi Titan Alloy for integrated die-casting, paired with 2200MPa ultra-high-strength steel. The brand has mature mass-production systems for aluminum and high-strength steel, while developing titanium alloy 3D printing for core components of high-performance models. This creates a multi-layer material matrix balancing mass manufacturability and extreme performance.

2. Building a Solid Technical Foundation via Talent and Patents

• Xiaomi Auto has formed a dedicated R&D team for titanium alloy additive manufacturing to conquer core technologies including powder formulations and printing processes. Collaborations with new material enterprises have yielded multiple patents covering the full workflow of automotive-grade titanium alloy 3D printing.
• Engineers have optimized TC4 titanium alloy powder to mitigate forming defects and boost component toughness and fatigue resistance. The material is suitable for electric vehicle chassis and brake parts, realizing end-to-end independent R&D spanning powder development, additive manufacturing and vehicle assembly.

1. Industry-Leading Progress

Xiaomi Auto's titanium alloy 3D printing technology has completed real-vehicle validation and been deployed in small batches on the SU7 Ultra for aerodynamic kits and precision interior connectors-while most competitors remain confined to laboratory-stage research.

2. Three Core Application Scenarios

① Lightweight unsprung chassis components: Integrally printed suspension brackets cut weight to enhance handling and vibration filtering;
② High-performance brake components: Titanium alloys' superior heat resistance elevates braking performance under extreme driving conditions;
③ Irregular thermal management components with complex flow channels: Optimize heat exchange for the 800V high-voltage platform and stabilize thermal control of the three-electric system.

3. R&D Efficiency Edge

Rapid prototype fabrication shortens vehicle development and validation cycles and accelerates model iteration.

1. Self-Developed Tiered Material Architecture Balancing Cost and Performance

Unlike most automakers that source finished components externally, Xiaomi Auto has extended upstream into raw materials and core manufacturing processes to build a tiered material system: integrated die-cast aluminum and ultra-high-strength steel are used for mainstream vehicle bodies to lower mass-production costs, while titanium alloy additive manufacturing is reserved for core parts of premium high-performance models to boost overall vehicle capability.

2. Synergistic Technological Iteration Creates Independent Technical Moat

The tiered material solution is compatible with all vehicles built on the Modena pure electric platform and Kunlun architecture, catering to both mass-market family cars and flagship performance vehicles. Paired with the self-developed multi-material AI simulation system, the brand can rapidly simulate mechanical performance of components under operating conditions to speed up iterative upgrades of material structures. This integration unifies material research, manufacturing processes and vehicle design, resolving the longstanding industry challenge of fragmented technical workflows across different segments.

Ruihang, as a direct manufacturer of titanium products, supply optimal quality raw materials for Titanium Alloy Additive Manufacturing. If you have any purchasing needs, please feel free to contact us via email: Sam.Rui@bjrh-titanium.com