Titanium is 60% denser than aluminum. so it is heavier.

Titanium Dioxide TiO2 is a highly compatible and well-tolerated substance. displaying a natural affinity with a wide range of chemicals. It exhibits impressive stability and tolerance towards various substances. including acids. alkalis. solvents. oxidizing agents. reducing agents. water and steam. Even common salts have little effect on its properties. However. it is worth noting that TiO2 may dissolve in highly concentrated or hot acids such as sulfuric acid. hydrofluoric acid and phosphoric acid. Similarly. while it shows excellent resistance to alkalis even at high concentrations. other factors such as temperature and pressure should also be taken into consideration when conducting compatibility testing in specific processes or applications. Overall. TiO2 consistently proves itself to be an inertial substance towards most chemicals in various conditions.

Polypropylene is formed through the polymerization of propylene (or propene) monomers, a process that links these simple molecules into long, repeating chains. This can be achieved through various catalyst-driven methods, with the most common being Ziegler-Natta catalysts, which enable the polymerization at relatively low temperatures and pressures, and Metallocene catalysts, which offer better control over the polymer structure. The conditions under which polypropylene is polymerized, including temperature, pressure, and the type of catalyst used, can significantly affect the properties of the final product, allowing for the creation of different grades suitable for a wide range of applications. These applications range from packaging, textiles, automotive parts, to reusable containers, showcasing its versatility and importance in the modern industrial landscape.