When a polymer breaks apart, it undergoes a process called depolymerization. This involves the breakdown of the polymer's long chain molecules into smaller units or monomers. Depolymerization can occur via various mechanisms including thermal degradation, where heat causes the polymer chains to fracture, or through chemical reactions, often involving catalysts or specific conditions that break the chemical bonds holding the polymer together. In biological contexts, enzymes can facilitate the breakdown of natural polymers like proteins (into amino acids) and polysaccharides (into simple sugars). This process is critical in recycling synthetic polymers, managing waste, and in the natural decomposition of organic materials. It's a reverse of polymerization, the process by which monomers join to form polymers.

Titanium is recognized for its exceptional strength-to-weight ratio, being one of the strongest and most durable metals, yet light in weight. Its strength can be compared to that of high-grade steel, but titanium is about 45% lighter. It has a tensile strength of about 434 MPa (63,000 psi), which varies based on the alloy and the processing it undergoes. Titanium's resistance to corrosion and high temperatures enhances its utility, making it an ideal material for aerospace, medical implants, and automotive applications. Its ability to endure extreme conditions without significant degradation adds to its value. However, the cost of extraction and processing makes titanium more expensive than some alternatives, limiting its use in certain industries.

In the context of amino acids, the designations D (dextro) and L (levo) refer to the molecule's orientation in relation to the asymmetric carbon atom most distant from the carboxyl group. The vast majority of amino acids in proteins are in the L-orientation, reflecting their natural biosynthesis and function in living organisms. However, D-amino acids do exist, primarily found in the cell walls of bacteria and in some peptide antibiotics, rather than being directly incorporated into proteins through ribosomal synthesis. One notable D-amino acid is D-alanine, which is crucial in microbial cell wall synthesis. While the question seems to be seeking a specific D-oriented amino acid, it's important to understand that several amino acids can exist in this form, albeit less common in proteins in higher organisms.