Ti plants should be repotted about once every two years. If your Ti plant has roots growing out the drain hole, seems to require more frequent watering, or is top-heavy and seems to fall over, then chances are it needs to be repotted.
Locate a container that is about three inches bigger around than the previous one. Add coarse gravel over the drain hole, then a layer of new potting medium. Gently ease your plant out of its old container, then settle it into its new home. Tuck in additional fresh potting soil, and water to settle it in.