How to eliminate electrostatic charges from titanium dioxide powder
The best way I've found is to use an anti-static gun (sold by chemical companies such as Sigma-Aldrich). 

If this isn't available, taking gloves off helps enormously, as the gloves can easily become 'static' in the same way as rubbing a balloon against some fabric. Gently tapping the flask against a metal object also helps, as the metal 'takes' the static away. 

I have also known chemists to wear the same anti-static/grounding bracelets used by people who work with computers so as not to damage the electrics internally, however for a bench-chemist only occasionally working with fine powders, this would probably be over kill.