In 1791. Rev. William Gregor made the initial discovery of titanium in a mineral known as manachite now called ilmenite in Cornwall. Being an amateur mineralogist. Gregor recognized that the mineral contained new elements and successfully extracted calcite or oxide from it. referring to it as soil lead ore. Around the same time. in 1795. German scientist Martin Heinrich Klaproth also came across titanium independently while studying the mineral rutile. Unaware that he had stumbled upon a previously discovered element. Klaproth named it after the Titan in Greek mythology. It was later established that both Gregor and Klaproth had identified the same element. with Gregor being credited as the original discoverer. However. the element is still commonly referred to by Klaproth's chosen name. Almost a century later. in 1910. Matthew A. Hunter of Rensselaer Polytechnic Institute managed to produce pure metallic titanium 99.9% using his method of heating sodium to 700-800CC with TiCl4. Despite this breakthrough. titanium did not become commercially available until the 1950s.

Titanium dioxide TiO2 is not classified as an endocrine disruptor by the U.S. Environmental Protection Agency EPA or European Food Safety Authority EFSA. It is important to stay informed about new scientific studies. as research continues. It is generally recommended to limit exposure to unproven substances if you are concerned about potential health risks.

To remove pine pitch sap from a polypropylene shirt, first place the garment in the freezer for a couple of hours. This step hardens the sap, making it easier to scrape off with a dull knife or spoon. Be gentle to avoid damaging the fabric. After removing as much sap as possible, apply a small amount of rubbing alcohol or a commercial stain remover designed for grease and oil on a clean cloth, and gently dab the stained area. Do not rub, as this may spread the sap deeper into the fabric. Once the sap has been treated, wash the shirt according to its care instructions, preferably separately to avoid contaminating other clothes. Avoid using heat (hot water or dryer) until the sap is completely gone, as heat can set the stain permanently.