Hey Mariah! When you are looking for the electron configuration of an ion with a charge such as Ti 2+, you can start by finding the electron configuration of the element. So, you can start with just Ti. If you use the full electron configuration, you should have 1s2 2s2 2p6 3s2 3p6 4s2 3d2. If you want to use the shorter version, you'll have [Ar] 4s2 3d2. Now, to find the configuration of the ion with the 2+ charge, simply remove two electrons.
Remember that you're making the ion less negative and more positive, so you have to take away 2 electrons. You are going to take them from the outter most shell : 4s. So take away the two electrons in that shell and your new configuration for Ti 2+ should be = 1s2 2s2 2p6 3s2 3p6 3d2 or [Ar] 3d2. Hope this helps! Let us know if you have any questions :)