Titanium Grade 1
The softest and most ductile commercially pure titanium grade, offering exceptional formability and corrosion resistance.
About Titanium Grade 1
Titanium Grade 1 is the softest and most flexible of all commercially pure titanium grades. It is also very resistant to corrosion, easy to shape, and easy to weld. Grade 1 titanium is the best choice for applications that need high purity, lightweight construction, and long-lasting strength in corrosive or high-performance settings.
At Hon Titanium, we offer high-quality Grade 1 titanium in a variety of forms, making sure that it has consistent purity, stable mechanical qualities, and reliable performance. Our Titanium Grade 1 materials come in sheets, plates, bars, tubes, and custom-fabricated parts. They are widely used in chemical processing, marine environments, heat exchangers, desalination systems, medical equipment, and other fields where corrosion resistance and structural reliability are very important. Hon Titanium’s Grade 1 titanium is very resistant to seawater, chlorides, oxidizing media, and industrial chemicals. This means it works well in a wide range of tough situations.
Service for Customization
Hon Titanium can fully customize Titanium Grade 1 items to fit the specific needs of your project. You can choose from a wide range of material forms, such as sheets, plates, rods, tubes, wires, and titanium parts that have been machined to a high level of accuracy.
We offer a variety of finishing and processing options, including polishing, pickling, annealing, surface cleaning, and custom machining, to meet your demands. We can cut, bend, weld, CNC process, and fabricate with strict tolerances, so you can be sure that your parts fulfill all of your engineering needs.
What is Ti Grade 1?
Titanium Grade 1, also known as Ti Grade 1 or CP-Ti Grade 1 (Commercially Pure), is the softest and most ductile of all commercially pure titanium grades. It is an unalloyed titanium that offers the greatest formability and highest purity among the CP grades (Grades 1, 2, 3, and 4).
Its properties are defined by its high purity and the strict control of interstitial elements, particularly its very low oxygen content. This combination makes it the preferred material for applications requiring extreme ductility and cold formability, coupled with excellent resistance to corrosion.
Ti Grade 1 Key Characteristics
- Best Ductility & Formability: This is the most defining feature of Grade 1. It has the lowest yield strength and highest elongation, allowing it to be easily cold-formed, deep-drawn, bent, and stamped without cracking.
- Excellent Corrosion Resistance: It exhibits outstanding resistance to corrosion in a wide range of media, especially in oxidizing environments (like nitric acid) and chloride-containing solutions (such as seawater and brines). Its performance often exceeds that of stainless steels.
- Excellent Weldability: Grade 1 is readily weldable using all standard welding procedures. The resulting weld joints maintain good ductility and toughness.
- High Impact Toughness: It retains excellent impact toughness, even at cryogenic temperatures, and does not exhibit a ductile-to-brittle transition like many carbon steels.
- Low Strength: As a trade-off for its high purity and ductility, Grade 1 has the lowest tensile and yield strength of all titanium grades. It is not suitable for high-load or structural applications.
- Biocompatibility: Like other CP titanium grades, Grade 1 is highly biocompatible and is not rejected by the human body, making it suitable for medical applications.
Mechanical Properties (Typical Minimums per ASTM)
These properties quantify the low-strength, high-ductility nature of Grade 1.
Chemical Composition
The properties of Grade 1 are achieved by strictly limiting interstitial (impurity) elements, most importantly Oxygen (O).
| Element | Symbol | Max. Content (%) |
|---|---|---|
| Oxygen | O | 0.18 |
| Iron | Fe | 0.20 |
| Carbon | C | 0.08 |
| Nitrogen | N | 0.03 |
| Hydrogen | H | 0.015 |
| Titanium | Ti | Balance |
Key Point: The maximum oxygen content of 0.18% is the lowest of all CP grades. For comparison, the more common Grade 2 allows up to 0.25% oxygen. This small difference is directly responsible for Grade 1’s superior softness and ductility.
Frequently Asked Questions
The primary difference is strength and ductility, which is controlled by the oxygen content. Grade 1 has less oxygen (0.18% max) and is therefore softer, more ductile (better for forming), and has lower strength. Grade 2 (0.25% max oxygen) is slightly stronger, less ductile, and is the most commonly used "workhorse" grade for general industrial applications. Choose Grade 1 specifically for extreme formability.
No. Ti Grade 1, like all titanium and its alloys, is non-magnetic (paramagnetic). This property is useful for medical (MRI compatibility) and military applications.
No. As a commercially pure (alpha) titanium, it cannot be strengthened by heat treatment (like quenching and aging). It can only be hardened through cold working. Annealing (heat treating at a moderate temperature and cooling) is used to soften the material after it has been cold-worked.
All titanium grades are significantly more expensive than stainless steels. Grade 1, being a high-purity grade, can sometimes have a cost premium over the more common Grade 2, but pricing depends heavily on the product form (e.g., sheet, pipe, foil), mill availability, and market conditions.