Ne Ty první Ti byli opravdzu zkratka od Titanium to slovo má i nvidia na webu
http://www.nvidia.co.uk/page/geforce3.html

Shadow Buffers
Another new feature of the GeForce3 Titanium series, shadow buffers create realistic shadow effects in real time. Enables self-shadowing for characters and objects, and softens the edges of shadows for realistic effects, adding depth to scenes and highlighting spatial relationships between objects.