Titania is known for having a good amount of super strength. It’s the real deal so lets not forget that, but at the same time it doesn’t matter a whole lot since Vegeta is much stronger than her. He’s also got a whole lot of long range options at his disposal so Titania won’t get close unless Vegeta allows it. One Big Bang Attack would be enough to end this match in the blink of an eye. Vegeta wins.
Suggested by iKnowledge Both of these characters have enhanced physical abilities, but Titania’s are in a completely different league. She got a super form during Fear Itself and her abilities are in the “Super” tier as opposed to meta human which is where Spock would be. Spock has his blaster, but Titania is quick enough to block the shots and close the distance between them. Once she is close enough then the round is over. Spock has no way to defend himself against her attacks and will quickly be overwhelmed by her talents. It’s game set and match. Titania wins.