"Freezing"
In Titanium Backup, you can "freeze" apps to disable them without having to uninstall them (which can't be restored since Titanium Backup doesn't back up built-in system apps). When you use this feature, neither the app nor its data is changed but only how it's registered to the Android OS. This is preferred to uninstalling system apps as problems have been seen when stock apps are missing, such as system updates failing. Be sure to set the "Apps processing mode" to "AUTO, Indirect" in the Titanium Backup settings otherwise freezing an app can take an extremely long time to complete.