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.

The material property of carrier mobility plays a significant role in determining electrical conductivity. and this is also true for titanium dioxide TiO2. Its carrier mobility is heavily influenced by factors such as morphology. crystal structure rutile. anatase. and plagioclase. mixing. and temperature. As a result. the carrier mobility of TiO2 is generally low. This characteristic makes it a popular semiconductor material in photocatalysts and solar cells. Numerous experimental studies have demonstrated that the electron mobility of TiO2 rutile phase falls within the range of 0.1-1 cm^2/Vs. while hole mobility is much lower at around 0.001 cm^2/Vs. However. these values can be enhanced through methods like doping or altering the nanostructure of TiO2. It's worth noting that these values are approximate and may vary depending on various factors like temperature. crystal quality. defects. etc.

In 1791. Rev. William Gregor discovered titanium. He found ilmenite in a stream in the Manacan Valley in Cornwall. He analyzed the sand and discovered the new metal in it. The metal was rediscovered four years later in the Austrian Alps by German scientist Martin Heinrich Klaproth. Titanium was named after the ancient Greek god Titan after he identified it as a new element.