Titanium Machining & Sourcing in Spartanburg, SC

Grade 5 and Grade 23 are both the alpha-beta titanium alloy Ti-6Al-4V, but Grade 23 is a higher-purity version with tighter limits on interstitial elements, and that distinction matters for demanding applications. Grade 23 is often called Ti-6Al-4V ELI, where ELI stands for extra-low interstitial. It has reduced oxygen, nitrogen, carbon, and iron content compared to standard Grade 5. Those interstitial elements increase strength but reduce ductility and fracture toughness, so by lowering them, Grade 23 gains superior fracture toughness, improved ductility, and better performance at low temperatures, at the cost of slightly lower strength than Grade 5. This makes Grade 23 the preferred choice for fracture-critical and biomedical applications, including medical implants, where toughness and biocompatibility are essential. Grade 5 remains the default for general high-strength structural parts where its excellent strength-to-weight ratio is the priority and extreme toughness is not required. When specifying, choose Grade 23 for implants and fracture-critical parts, and Grade 5 for general structural and performance components.

Titanium costs more to machine than steel or aluminum because of its physical properties, which slow the process and consume tooling. The biggest factor is its low thermal conductivity. When you machine steel or aluminum, much of the cutting heat flows into the chip and away from the tool. Titanium does not conduct heat well, so heat concentrates at the cutting edge, dramatically accelerating tool wear and risking work-hardening of the part surface. To manage this, shops must run titanium at low cutting speeds, which directly increases cycle time and therefore cost. Titanium is also strong and somewhat elastic, which means it deflects under cutting forces and requires rigid setups and careful workholding to hold tolerance, adding setup time. The material itself is expensive relative to common metals, and chip handling requires extra care because fine titanium chips are flammable. The combination of slower machining, higher tool consumption, more demanding setups, and costly raw material all stack up. The practical implication is to design titanium parts with manufacturability in mind and to source from shops experienced with the material to control cost.

Yes. Spartanburg has a growing medical-device manufacturing presence, and its precision machining base, hardened by years of meeting automotive quality standards, is well suited to medical-grade titanium work. For medical parts, the typical material is Grade 23 titanium, the ELI version of Ti-6Al-4V, chosen for its fracture toughness and biocompatibility. The critical requirements go beyond machining and into quality systems. Medical titanium work generally demands an ISO 13485 quality management system, full material traceability back to the mill heat, certified chemistry and mechanical properties to the applicable ASTM or AMS specification, validated processes, and often biocompatibility documentation. Surface finish and cleanliness requirements are typically stringent, and parts may require passivation and specialized cleaning. When sourcing medical titanium locally, confirm the shop holds ISO 13485 certification, ask about their experience with implant or instrument work, and clearly define your specification, traceability, finish, and documentation requirements. The combination of regional precision capability and growing medical-device infrastructure makes this work feasible in the Upstate.

Grade 2 titanium is generally not the right choice for high-strength structural parts, and understanding why guides better material selection. Grade 2 is commercially pure titanium, meaning it is essentially unalloyed. Its strengths are excellent corrosion resistance, good formability, and ready weldability, but its mechanical strength is modest, with tensile strength around 50 ksi. That is well below the roughly 130 ksi of Grade 5 Ti-6Al-4V. For applications where corrosion resistance is the priority, such as chemical-process components, heat exchangers, tubing, and tanks, Grade 2 is ideal and its lower strength is irrelevant. But for load-bearing structural parts, fasteners, fittings, and components where strength-to-weight is the whole reason for choosing titanium, Grade 2 simply does not provide enough strength, and you should specify Grade 5 or Grade 23 instead. A useful way to frame the decision is to ask whether you are choosing titanium for its corrosion resistance or for its strength. If corrosion resistance, Grade 2 may be perfect and more economical to machine. If strength-to-weight, move to the alloyed grades.

For aerospace titanium parts, you should require a layered set of certifications and documentation that proves both the quality system and the special processes. At the quality-system level, the shop should hold AS9100 certification, the aerospace-specific quality management standard built on ISO 9001. For the material itself, require full traceability back to the mill heat, with certified chemistry and mechanical properties conforming to the applicable specification, typically an AMS specification for the grade and form such as AMS 4928 for Grade 5 bar. Many aerospace titanium parts undergo special processes like heat treatment, chemical processing, and nondestructive testing, and these should be performed by NADCAP-accredited sources, since NADCAP accreditation is the industry standard for special-process approval. Depending on the application, you may also need first-article inspection reports per AS9102, documented process control, and possibly ITAR registration if the work involves defense-controlled designs. When sourcing, define the applicable AMS or ASTM specification, the required certs and test reports, and the NADCAP-accredited special processes up front. A shop genuinely serving aerospace will have these systems in place and will expect such requirements.