(February 2014) Allusion is a figure of speech, in which one refers covertly or indirectly to an object or circumstance from an external context. It is left to the audience to make the connection; where the connection is directly and explicitly stated (as opposed to indirectly implied) by the author, it is instead usually termed a reference.
Titanium metal connects well with bone, so it has found surgical applications such as in joint replacements (especially hip joints) and tooth implants. The largest use of titanium is in the form of titanium(IV) oxide. It is extensively used as a pigment in house paint, artistsâ paint, plastics, enamels and paper.
Named after the Titans of Greek mythology, titanium is a hard, lustrous, white metal. It is very corrosion resistant and generally not affected by air, water, acids or bases. Titanium is very common in the Earthâs crust, being the 9th most common element. It is also common in meteorites, the Sun and Moon. Titanium oxide spectra are used by astronomers to identify cool red dwarf stars.