(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 never found pure in nature; it is always bonded to other elements. Titanium is also found in asteroids and on rocks from the moon. Because titanium is a light and strong metal, it has a lot of uses. It is used in aircraft, ships, racing bikes, and spacecraft. It can also be found in some computers, golf clubs, and tennis rackets. The compound titanium dioxide is colored bright white, so it used very often in paint.