Description Colouring Process of Crystallised Titanium: Heat Treatment and Electrochemical Anodising Crystallised titanium can be coloured either by controlled heating in air or by anodising in an electrolytic bath. In the heat-treatment method, clean the piece and heat it in a furnace or with a torch in air at specific temperatures (°C) to produce interference colours: ≈385 °C: pale gold–straw ≈412 °C: purple ≈440 °C: deep blue ≈510 °C: light green ≈565 °C: red-purple ≈648 °C: brown-gray ≈925 °C: green-blue These colours arise from successive titanium-oxide phases (TiO₂, Ti₂O₃, etc.) forming thin-film interference layers Wikipedia. For electrochemical anodising, immerse the titanium part as the anode in a 10–20% H₂SO₄ (sulfuric acid) bath at 20–22 °C. Apply 15–110 V DC (depending on the desired hue) at a current density of 15–30 A/ft² (≈1.5–3 A/dm²) for 1–5 minutes. Typical colors include: 20 V: purple 30 V: blue 60 V: orange 90 V: blue-violet 110 V: green The exact hue is controlled by oxide-layer thickness, which grows approximately 1.7 nm/V, producing vivid, dye-free finishes 3ERP. Applications of Crystallised Titanium Applications of Crystallised Titanium and Timascus encompass a broad spectrum, ranging from functional tools to high-end fashion accessories, highlighting its versatility and unique appeal: Knifemaking. The knife community grabbed crystallised titanium first, and it’s easy to see why: lightweight crystallised titanium scales or bolsters that gleam like fractured ice, yet still hold up to everyday carry abuse. Makers will often plasma-etch or low-voltage anodise the dendritic surface, turning each ridge into a micro-rainbow that sets off a mirror-polished blade. Jewelry and wearable art. Ring blanks in Grade 2 crystallised Ti have become a staple on lathe-turning forums. The material machines cleanly, handles a high lustre, and — thanks to its biocompatibility — won’t set off nickel allergies. Anodising lets artists “paint” across the crystals in gradients of teal, violet, and gold without any dyes or plating. Exclusive watches. A few boutique watch brands have begun using crystallised titanium for bezels and case backs. Besides the head-turning texture, the higher surface hardness shrugs off pocket scratches, and the oxide film resists sweat better than stainless steel. (REFERENCE: https://nobliecustomknives.com/crystallized-titanium/)
