(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.
Titanium is a very strong metal. It is chemical element number 22 on the periodic table. Its symbol is Ti. Titanium alloys are used in aerospace engineering to make very strong and light parts of airplanes. It does not corrode, not even in sea water and chlorine. However, it can burn at high temperatures, and titanium dust is extremely flammable. It has 22 electrons, 22 protons and 26 neutrons.