No, they won't. Why do people think the bubbles will disappear? Each titan generates 3 orbs with Crest of Alpha Lupi every time they summon a bubble. Get enough defender titans on one team... and they will recharge each others bubble so they can keep summoning them nonstop until the match ends, or until the strategy is disrupted. Edited for number of orbs generated by Crest of Alpha Lupi. Thanks Ipatton