We have what is unique

Q: What is titanium?
A: Sometimes called the "space age metal", titanium has a low density and is a strong, lustrous, corrosion-resistant (including sea water, aqua regia and chlorine) transition metal with a silver color.

Q: Can titanium harm my body if I wear titanium jewelry?
A: No. Titanium is non-toxic even in large doses and does not play any natural role inside the human body. That's why it is so widely used in medical field for implants, piercings as well as surgical instruments.

Q: Will I be allergic to titanium?
A: Although titanium is a reliable metal which is used in many forms, it can still cause an allergy in rare occassions. Study shows there are about 4% of the population is effected by titanium allergy. People with other metal allergies such as nickel, cobalt and chrome allergies stand at a high risk of allergy to titanium. If you are allergic to other metal, make sure to take a medical test before shopping for titanium products.

Q: How can I tell differences between titanium and other metal?
A: 1. In its unalloyed condition, titanium is as strong as some steels, but 45% lighter. The density of titanium is 4.5g/cm^3, while steel is 7.85g/cm^3.

We took a piece of titanium hair stick and a piece of stainless steel hair stick for a comparison. From the image below, you can tell they are almost same in width, but titanium hairstick is longer.

They are about as thick as well.

We used a regular postal scale to weigh both hairsticks. Titanium stick's weight was jumping between 10g and 15g for a few seconds (because the accuracy of a postal scale is only 5-gram) and stopped at 10g.

And the stainless steel stick weighed 20g.

2. Aluminium vs. titanium: aluminium has a density of only 2.7g/cm^3 so it is even lighter than titanium. However, it is also much softer than titanium. Take our titanium hairstick as an example, at 2mm thick, we will have to use some force to bend it. But if it was made of alumnium, the job is much easier.

3. We saw from an article that when you hold titanium against a grinding wheel, the sparks are "brilliant white". So we did the same experiment. It was true - we saw bright white sparks that we have never seen before from other common metal.

4. Now we have a piece of titanium hairstick with a "not-so-shiny" tip after the grinding. We scratched it on a piece of white china, and it left a silver gray mark that cannot be removed by all means. This was a tip from a friend. :)