Ti-15Mo is a binary beta titanium alloy — just titanium and roughly 15% molybdenum, with no aluminum, vanadium, or nickel. Molybdenum is one of the strongest beta stabilizers available, and at this concentration the alloy sits well past the threshold needed to hold a fully beta structure at room temperature. That simple, biocompatible chemistry is why Ti-15Mo has become a popular choice for dental and orthopedic implant hardware, wire, and other biomedical components.

This page covers the alpha + beta condition, meaning material that has been given a duplex heat treatment: solution treated in the beta field, then aged at an intermediate temperature below the beta transus to deliberately precipitate fine secondary alpha phase throughout the retained beta matrix. That precipitation reaction behaves much like age hardening in other metal systems — the fine alpha particles impede dislocation movement, raising strength and hardness substantially compared to the as-solution-treated material. The tradeoff is reduced ductility relative to the single-phase beta condition, which is why alpha + beta Ti-15Mo is generally specified where higher strength matters more than maximum formability.

Ti-15Mo carries titanium's usual baseline challenges — low thermal conductivity that keeps heat concentrated at the cutting edge, chemical reactivity with tool materials, and a low modulus that promotes deflection under load — and the alpha + beta (aged) condition pushes those challenges further. The fine alpha precipitates that give this condition its strength also raise hardness and cutting forces noticeably compared to the softer, single-phase beta condition of the same alloy, making it more demanding on tool edges and requiring more conservative parameters.

Because the aged microstructure work-hardens readily if a tool rubs instead of shearing cleanly, feed consistency is critical — hesitating or backing off feed to "go easy" on a hard surface typically glazes it instead, accelerating wear on the very next pass. A rigid setup, sharp cutting edges, and steady coolant flow to manage heat at the tool tip remain the fundamentals, with speeds set toward the conservative end of the titanium range given the elevated hardness of this condition relative to the beta-condition version of the same material.