Titanium Alloys: The Core Material for Lightweight Joints in Collaborative Robots

Titanium alloys (such as Ti-6Al-4V), with their low density of 4.5g/cm³ and tensile strength of ≥900MPa, are the preferred choice for lightweighting joints in collaborative robots. In patent CN109571540A, titanium alloy connectors are pre-embedded in carbon fiber joints and positioned by 4 limit blocks, which improves rigidity and reduces the joints self-weight by 30%, while also achieving milliohm-level equipotential design to avoid electrostatic interference19. Its biocompatibility also supports direct contact with human tissues in medical robots.