Titanium. symbol Ti and atomic number 22. is a versatile chemical element. It is renowned for its high strength-to-weight ratio. providing both durability and a 45% lighter weight than steel. This makes it a popular choice in various industries such as marine. chemical processing. and desalination. As a transition metal with silver coloring. titanium was first discovered in 1791 by amateur geologist William Gregor. Production of this metal began commercially in the early 1900s and can be found widely distributed throughout the Earth's crust - approximately 0.6%. Its natural composition commonly results in it being combined with other elements. Titanium alloys are highly sought after for their exceptional strength to weight ratios and are utilized in aerospace. military. automotive. medical prosthetics industries and more.

Polypropylene is a synthetic material widely used in the production of clothing, particularly for thermal underwear and sportswear. Its thermal properties stem from its ability to wick moisture away from the skin, keeping the wearer dry. While it does not have the same insulating capabilities as materials like wool or down, which trap warm air close to the body, polypropylene's moisture-wicking feature contributes to thermal comfort by preventing the cooling effect of wet fabric against the skin. Therefore, while polypropylene might not be the warmest material on its own, it can help maintain body temperature in cold conditions by keeping the skin dry. It's often used in layers, under more insulative materials, to maximize thermal efficiency without retaining moisture.

Writing on polypropylene can be a bit challenging due to its non-porous surface which causes most inks to smear or not adhere well. To effectively write on polypropylene, you should use a permanent marker specifically designed for use on plastic surfaces. These markers have a special ink formula that dries quickly and adheres firmly to polypropylene surfaces, ensuring the writing stays put. Before writing, make sure the surface is clean and dry to optimize ink adhesion. For tasks requiring more precision or permanence, consider using paint pens or even etching for a more durable mark. Using an adhesion promoter or primer designed for polypropylene can also improve the adherence of inks and paints. Always test the chosen writing instrument on a small, inconspicuous area first to ensure it meets your needs.