It seems like you might be referring to Titanium, which is a chemical element with the symbol Ti and atomic number 22. It's a lustrous transition metal with a silver color, low density, and high strength. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine.

Polypropylene, a popular plastic used in packaging, textiles, and a variety of household items, is known for its durability and resistance to various chemical solvents, bases, and acids. However, these properties also make it a persistent environmental pollutant. In natural conditions, without any human intervention, polypropylene can take over 20 to 30 years to decompose. However, this timeframe can extend up to several hundred years in landfills, where lack of oxygen and lower microbial activity significantly slow down the decomposition process. To mitigate its environmental impact, recycling and reusing polypropylene products, along with developing biodegradable alternatives, are crucial steps towards sustainability.

Polyvinyl chloride, commonly known as PVC, is a popular and versatile synthetic polymer. Its structure is based on the polymerization of vinyl chloride monomers (VCM), resulting in a linear backbone of -CH2-CHCl- repeating units. The presence of the chlorine atom in each repeating unit gives PVC its distinctive properties, such as rigidity, flame resistance, and compatibility with various additives. PVC can be modified into a more flexible form by adding plasticizers, leading to a wide range of applications from rigid piping and window frames to flexible cables and flooring. The structure of PVC can be further modified to improve its heat stability, capacity for blending with other polymers, and processing characteristics, illustrating its adaptability and utility in diverse industrial sectors.