Grade 1 Titanium, also designated as UNS R50250 in the Unified Numbering System, represents the purest commercially available form of titanium. As the softest and most ductile among the four commercially pure (CP) titanium grades, it delivers unmatched formability and exceptional corrosion resistance, making it indispensable across industries ranging from chemical processing to medical implants. At TSM Technology Co., a leading China-based manufacturer and supplier, we maintain comprehensive stock of Grade 1 titanium products in sheets, plates, bars, tubes, and wire-all available for immediate sale with competitive price positioning and full material certification.
What is Grade 1 Titanium?
Grade 1 Titanium is the first of four commercially pure (CP) titanium grades, characterized by the highest purity levels among all titanium materials-typically 99.5% minimum titanium content. Unlike alloyed titanium grades (such as Grade 5 Ti-6Al-4V), Grade 1 contains no intentional alloying additions; its properties are controlled primarily through strict limits on interstitial elements-oxygen, nitrogen, carbon, and iron.
The Purity Advantage
Technical Analysis & Material
Material Properties
The defining trait of Grade 1 titanium is its low content of 'interstitials'-specifically oxygen and iron. This chemical purity enables its legendary formability. Under ASTM B265 and B348, the material balance is over 99.5% pure titanium.
Chemical Composition Table (ASTM B265)
| Element | Titanium (Ti) | Iron (Fe) | Oxygen (O) | Carbon (C) | Nitrogen (N) | Hydrogen (H) |
| Content (% Max) | Balance (Min 99.5%) | 0.20 | 0.18 | 0.08 | 0.03 | 0.015 |
Grade 1 vs Grade 2 Titanium: Selecting the Right CP Grade
The comparison of grade 1 vs grade 2 titanium is the most frequent query we receive at TSM. While both are commercially pure, they serve different operational roles. Grade 2 is often called the 'workhorse' because it balances strength and ductility, whereas Grade 1 is chosen when formability is the non-negotiable priority.
| Property | Oxygen Content | Yield Strength | Tensile Strength | Ductility (Elongation) |
| Grade 1 Titanium | ≤ 0.18% | 170 MPa | 240 MPa | 24 - 30% |
| Grade 2 Titanium | ≤ 0.25% | 275 MPa | 345 MPa | 20% |
Tensile Strength (UTS)
Exceptional Corrosion ResistanceThe 'superpower' of titanium Grade 1 is its spontaneous formation of a passive titanium dioxide (TiO2) layer. This film is stable, adherent, and instantly regenerates if damaged, providing immunity to:
•Saltwater: Total resistance to pitting and crevice corrosion in marine environments.
•Oxidizing Acids: Superior performance in nitric and chromic acids.
•Chlorides: Excellent stability in the presence of wet chlorine gas and bleach solutions.
Why TSM Recommends Grade 1：If your fabrication involves extreme cold-forming, such as the corrugation of heat exchanger plates or deep-drawn battery cases, titanium Grade 1 is mandatory. Its lower yield strength ensures the material flows into the mold without fracturing, ensuring zero-defect manufacturing.
TSM Technology Co.'s Titanium Grade 1 Supply Range
We offer cold-rolled and hot-rolled options with surface finishes ranging from 2B to pickled.
Standard：ASTM B265, ASME SB265
Thickness：0.5 mm - 100 mm
Width：Up to 2500 mm
Precision-straightened rounds and billets for machining and forging into chemical components.
Standard：ASTM B348, AMS 4921
Diameter：3.0 mm - 400 mm
Length：Up to 6000 mm
The standard for desalination plants and power plant condensers. We provide both seamless and welded options.
Standard：ASTM B338, B861
OD Range：6 mm - 219 mm
Wall Thickness：0.5 mm - 15 mm
High-purity welding wire (ERTi-1) for porosity-free, ductile weld deposits in reactive environments.
Standard：AWS A5.16, ASTM B863
Diameter：0.1 mm - 6.0 mm
Form：Spools, Straight Rods
Looking for a quote or technical consultation? Contact TSM Technology Co. Today to discuss your project requirements with our materials experts.
Critical Applications: Where Does Grade 1 Titanium Perform Best?
The unique combination of low density (4.51 g/cm³), biocompatibility, and extreme corrosion resistance makes Grade 1 titanium the go-to material for these key sectors.
Chemical Processing
Used in reactors and heat exchangers due to its immunity to chlorides and nitric acid.
Marine Engineering
Essential for desalination and underwater hardware where saltwater corrosion is a constant threat.
Medical & Dental
Biocompatible and non-toxic, ideal for surgical mesh, pacemaker cases, and orthodontic braces.
Chlor-Alkali Anodes
Substrate for Dimensionally Stable Anodes (DSA) in chlorine and sodium chlorate production.
Welding and Machining Grade 1 Titanium
Working with Grade 1 titanium requires a specific set of parameters to avoid contamination and tool wear. Because it is so ductile, it has a tendency to 'gall' or stick to cutting tools.
Machining
•Speeds and Feeds: Use low cutting speeds (30–60 m/min) but high feed rates. This prevents work hardening and ensures the tool 'bites' into the material rather than rubbing against it.
•Coolant: Generous amounts of sulfur-free coolant are required to carry away heat from the cutting edge.
Welding
Titanium Grade 1 is highly weldable, but it must be shielded from the atmosphere until it cools below 400°C.
1.Inert Gas: Use ultra-pure Argon (99.995%) for the torch and a trailing shield.
2.Cleanliness: Remove all oils and fingerprints with acetone before striking an arc; even a single fingerprint can cause embrittlement.
3.Filler Metal: Use AWS ERTi-1 filler wire to maintain the purity of the weld joint.
Why Choose TSM Technology for Your Grade 1 Titanium Needs?
TSM TECHNOLOGY CO. boasts over 20 years of experience in the titanium industry, seamlessly blending high-volume production with custom precision machining. We focus on providing Grade 1 titanium solutions, ensuring superior material properties and flatness, along with rapid delivery cycles.
Whether you need materials for small-scale testing in the early stages of a project or for large-scale collaborations, our team of materials experts and engineers will strive to help you optimize material selection, balancing performance and cost to meet your project's requirements.
Frequently Asked Questions (FAQ)
Is Grade 1 titanium magnetic?
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No. Grade 1 titanium is non‑magnetic, making it suitable for MRI equipment and other sensitive electronic applications.
Can Grade 1 titanium be welded to stainless steel?
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Not directly. Direct welding creates brittle intermetallic phases. A transition layer of tantalum, vanadium, or niobium is required for dissimilar metal joints.
What is the maximum service temperature for Grade 1 titanium?
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Approximately 300°C (570°F) in oxidizing environments. Above this temperature, surface oxidation accelerates and mechanical properties degrade.
Does Grade 1 resist hydrochloric acid?
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It performs well in dilute, room‑temperature HCl (<10%), but is not recommended for hot or concentrated HCl. For such environments, consider Grade 7 (Ti‑0.15Pd) or Grade 12.
What is the difference between Grade 1 and Grade 7 titanium?
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Grade 7 is a palladium‑added alloy (Ti‑0.15Pd) with superior corrosion resistance in reducing acids (e.g., hot HCl, sulfuric). Grade 1 is preferred for formability and cost‑effectiveness in oxidizing or chloride‑rich environments.
