Travis did say himself I think that he wants to have one marriage and stay with that person forever. Something along thoose lines. So he doesn't take marriage that lightly. I'm not sure if he'll propose. If after the hometown dates and fantasy dates he finds a woman that he really and truely loves, and he knows that she's the one for him, then I think yes he'll most likely propose.
Seeing, however that he hasn't really said yet that he's falling in love with any of them , I don't think he'll propose. Unless by some miracle all of a sudden he decides he's fallen in love. Which is not very likely. And since he's about to send Sarah B home, who looks like the only one with which he really has a "connection"... well he's probably just gonna keep that ring. Although there is that pic with him holding the ring. hmmm