Titanium is a strong, lightweight, and corrosion-resistant metal widely used in various industries such as aerospace, automotive, and jewelry. One of the unique properties of titanium is its ability to change colors when subjected to heat or electrical treatments. This characteristic allows for creative and visually stunning designs on titanium products. In this article, we will guide you through 5 steps on how to color titanium.

1. Prepare the Titanium Surface:

Before starting, clean the titanium surface thoroughly. Remove any grease, oil, or dirt using a degreaser or rubbing alcohol. Next, use fine-grit sandpaper (800-1000 grit) to sand the surface lightly. This step will ensure proper adhesion of the oxide layer that forms during coloring.

2. Choose the Coloring Method:

There are two primary methods for coloring titanium – heat treatment and anodizing. Heat treatment involves applying direct heat or flame to the metal surface, resulting in a color change due to oxidation. Anodizing uses an electric current passed through an electrolyte solution that reacts with the titanium surface to form an oxide layer.

3. Heat Treatment Method:

For the heat treatment method, you will need a propane torch or another high-temperature heat source.

– Put on your safety equipment (gloves and glasses).

– Hold the titanium piece with a pair of pliers, or secure it in a vice if it’s larger.

– Apply heat evenly across the surface by slowly sweeping the flame back and forth.

– Observe the color change as you apply heat – titanium turns brown, then purple, blue, yellow, and finally light grey.

– Stop heating once you reach your desired color.

– Allow the piece to cool naturally before handling.

4. Anodizing Method:

For anodizing, you will require a DC power supply (with adjustable voltage), an electrolyte solution (such as TSP or baking soda mixed with water), and a titanium wire as an anode.

– Prepare the electrolyte solution by mixing the TSP or baking soda with water in a plastic container.

– Attach one lead from the DC power supply to the titanium piece (cathode) and the other lead to the titanium wire or anode.

– Put on your safety equipment (gloves and glasses).

– Dip both the titanium piece and wire into the electrolyte solution, making sure they do not touch each other.

– Adjust the voltage to achieve desired color – 15V for blue, 20V for purple, 45V for green, 60V for gold, and 80V+ for pink, etc.

– When you reach your desired color, remove both the titanium piece and wire from the electrolyte solution and rinse them under running water.

– Let them dry completely before handling.

5. Seal and Protect The Colored Titanium:

Once your titanium piece is colored and dry, apply a clear coat, wax, or oil to help protect the oxide layer from scratches or fading. This step will give your titanium a more durable finish that preserves its vibrant colors.

By following these five steps, you can effectively and creatively add unique colors to your titanium projects. With proper care and handling, these colored creations can last for years while showcasing their aesthetic appeal.