I too have been trying to put my 2 guys together, but the more I thought of it, I dont' want to risk a beak injury. There is a size difference with mine, 205g compared to 143g.
On the positive side, my Pionus was standoffish, would bite and lunge, not all the time, but enough to make my husband not want to handle her at all, and me wary of handling her. Since Lula came along, Jeze has made a complete turnaround. She steps up so eagerly now, will sit in the living room with us now, something that used to send her in a tizzy, she was terrified of the television. I am even able to sneak a quick kiss on the head, something a few months ago I would've NEVER attempted. And, she now stays up at night, before, once the sun went down, she was ready for bed and there was no getting her out of sleep mode. It sometimes felt like I didn't even have a bird. Now, once I put the cover on the cage, she runs up to the front for a scritch, something I never expected from her.
She still has a day here and there where she doesn't want to be bothered, but hey, I now have a companion bird as opposed to a mean, nasty one.
I was also afraid they would bond to each other, and not like me anymore, so I've thrown the idea of them being "friends" out the window. They live in the same room, do not mind each others presence at all, (meaning no displaying, yelling ect. at each other)
so after all this typing, yes, I'd say another bird who enjoys handling and human companionship may bring Tlital out of his shell, like Lu did for Jeze, but if you are determined to have them be cage-mates, I would take it slow, and be prepared with a towel or something just in case of a scuffle. JMHO.
Jezebel, White Capped Pionus
Lu, Hahn's Macaw
Bubbles, Toy poodle