Titania runs best with the official graphics card driver from NVIDIA or ATI depending on your systems graphics card. This will enable more features and increases rendering speed.
If you want to install the latest graphics card driver from NVIDIA or ATI for Ubuntu go to »System Settings« in the Dash, or click the little gear in the launcher at the top right corner of your desktop:
After that go to »Software & Updates« and then click on the »Additional Drivers« tab. Now select the nvidia-updates or fgrlx-updates radio item. Then click on »Apply Changes«. Don't forget to reboot your computer after the installation process has completed.