The Titan DuPont R105 or Titanium Dioxide R105 is one of the Rotile Titans. Application of Titan DuPont R105: Like other titanium, its main use is bleaching. Titanium R105 is mainly used in plastic materials, especially in UPVC windows that are used outdoors. This titanium is resistant to UV rays and sunlight due to its special properties and does not change color in outdoor spaces. Titanium dioxide R105, titanium oxide R105 and titanium dioxide grade R 105 are other names of Titan Dupont R105.