Gum Titan is a less powerful style of Titan Magic. The user only utilizes the elastic properties given to them by the Magic rather then the size increasing powers.
Titan Magic enables the user to strech and grow the their limbs to extraoridinary lengths and sizes. Gum Titan however only uses the streching properties of the Magic. The users body appears to be rubber and intangable giving the user the ability to strech their limbs to incredible lengths.