The effects of a DC electric field on the growth processes of titania particles formed in a premixed CH4-O-2 flame were investigated for three basic types of electrode geometry, namely pairs of needle tips, spheres and plates. The conclusions are based on measurements of the primary particle diameter, agglomerate mobility distribution and fractal dimension, agglomerate charge distribution, as well as flame temperature profile and electrical current, wherever possible with spatial resolution. Changes in primary particle diameter and rutile content were found to correlate well in magnitude and sign with shifts in flame temperature profile induced by the electric field. When measured just above the flame, needle electrodes were found to increase agglomerate sizes (in terms of average number of primary particles per agglomerate) by up to 3-fold, explainable by a redistribution of aerosol mass into more but smaller primary particles (as a result of lower flame temperatures). Electrostatic enhancement did not play a significant role as particle charge distributions remained bipolar and little affected by the field. Plate electrodes lead to a slowing of agglomerate growth which compensated the increased number of smaller primary particles, resulting in a little net change in number of primary particles as compared to no field. This is caused by separation of the aerosol into a positively and a negatively charged plume as suggested by Vemury et al., however without addition of charge carriers. Aside from the slowing of coagulation in the plate configuration, which can be considered a primary electrostatic process, the effects of electrical fields resulted mostly from secondary mechanisms, especially shifts in local flame temperature, which reduced or enhance the sintering rate in primary particles. Their magnitude depended on applied potential difference alone, not on electrode polarity.