GR1 material is the core material used in the manufacture of high-end titanium cups. It is virtually the purest form of industrial-grade titanium available, and thanks to its unique "soft" properties, it perfectly meets the requirements of titanium cups for extreme lightness, optimal health and safety, and complex cup-forming processes.
Ultra-lightweight, the top choice for outdoor activities: GR1 pure titanium has a density of approximately 57% that of steel. A 420-milliliter single-wall titanium cup weighs about 71 grams, while a 1,000-milliliter water bottle weighs only about 173 grams-offering clear advantages for activities like hiking and camping.
Healthy, Safe, and Preserves the Original Flavor: GR1 is a medical-grade material suitable for implantation in the human body. It is chemically extremely stable and does not react with tea, coffee, juice, or other beverages; it does not leach any metallic odors, ensuring that the original flavor of your drink is preserved to the greatest extent possible. Additionally, its natural surface oxide film provides antibacterial protection.
Corrosion-Resistant and Lasts Like New: The surface of GR1 instantly forms a dense titanium dioxide passivation layer that resists acids, alkalis, and corrosion, and never rusts. You need not worry at all, even when storing acidic beverages.
Perfectly Suited for Manufacturing and Highly Malleable: This is the most crucial factor. GR1 is the most ductile and malleable grade of industrial-grade pure titanium, with an elongation of over 30%. This allows it to be easily processed using complex cold-forming techniques such as deep drawing and spin forming to create a seamless, monolithic cup body-something that is difficult to achieve with high-strength titanium alloys (such as Gr5). It is also easy to weld, making it ideal for producing double-walled vacuum-insulated cups.
I. Material Properties and Process Suitability of GR1 Titanium Tubing
1. Advantages of Pure Titanium
Industrial-grade pure titanium (GR1) has low impurity content and excellent ductility (elongation ≥24%), making it suitable for forming thin-walled tubes through processes such as spin forming and drawing.
It is chemically stable and does not react with beverages such as water, tea, or coffee at room temperature, preventing the leaching of metal ions and ensuring drinking safety.
2. Processability
Compared to titanium alloys (such as GR5), GR1 has lower hardness and higher cold-forming efficiency, enabling mass production of seamless or welded titanium tubes at a controllable cost.
The surface can be treated through polishing, anodizing, and other methods to achieve a smoothness of Ra ≤ 0.6 μm, preventing the buildup of tea stains.
II. Validation Through Real-World Application Cases
1. Mainstream Product Applications
Thermos brands such as KingStar and Haers use GR1 titanium tubes to manufacture double-walled vacuum-insulated thermoses, suitable for large-capacity designs of 500 ml or more, combining lightweight construction with long-lasting heat retention (6–12 hours).
In the titanium kettle and tea-steeping kettle sectors, TA1 thin-walled titanium tubes are spun into one-piece bodies capable of withstanding high-temperature welding at 1660°C, meeting the demands of scenarios such as boiling water and steeping tea.
2. Performance Characteristics
Antibacterial Properties: The GR1 surface oxide film inhibits the growth of microorganisms such as E. coli, eliminating the need for chemical cleaning agents during long-term use.
Freshness Retention: Titanium's stable electronic structure prevents oxidative reactions from degrading nutrients such as tea polyphenols, preserving the tea's original flavor.
III. Industry Standards and Limitations
Process Complexity: Welding titanium tubes requires argon gas protection; the investment in precision equipment drives up initial production costs, making small-batch customization challenging.
IV. Conclusion
GR1 titanium tubing is fully suitable for tea cup manufacturing; its biocompatibility, processability, and health benefits align with the demands of high-end tea sets. Current technology has achieved full product category coverage, ranging from titanium cups to titanium teapots; however, due to its high cost, it is primarily targeted at the mid-to-high-end consumer market.
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