Can anyone tell me exactly all they were and what they did?

Well, it happened after Crisis on Infinite Earths. Wonder Woman's own pre-Crisis history was written out of existence, and the character was reintroduced in Wonder Woman (vol. 2) #1 (February 1987). With the character of Donna tied predominantly to the Titans, her origin was retconned to fit into the new continuity created by Wonder Woman's relaunch, one severing her direct ties to the Amazons. In the storyline "Who Is Wonder Girl?" featured inThe New Titans #50-54 (December 1988-March 1989), the Titans of Myth enlist Donna's aid against the murderous Sparta of Synriannaq. It is revealed that the Titan Rhea had rescued a young Donna from a fire; Donna and Sparta had then been part of a group of 12 orphans from around the universe who had been raised on New Cronus by these Titans as "Titan Seeds," their eventual saviors. The Seeds had been given superhuman powers, and named after ancient Greek cities. Called "Troy," Donna (like the others) had eventually been stripped of her memories of her time with the Titans of Myth, and reintroduced into humankind to await her destiny; Sparta had retained her memories, and the knowledge had eventually driven her mad. Killing her fellows Seeds to "collect" their powers and destroy the Titans of Myth, Sparta is ultimately defeated by Donna and the only other Seed left alive, Athyns of Karakkan. In The New Titans #55 (June 1989), Donna changes her pseudonym from Wonder Girl to Troia and adopts a new costume incorporating mystical gifts from the Titans of Myth.

From wikipedia :

Donna receives several gifts: a pendant of Cronus, from Coeus; an armored metal from Thia and Hyperion; earrings from Iapetus and Themis; a bracelet that had belonged to Phoebe; a cloth of the firmament, from Mnemosyne and Crius; a mystic net from Oceanus and Tethys; and the name, Troia, from Rhea.

I think the force field came from the bracelet. Projection of light from the armored metal from Thia and Hyperion. There were 6 pairs of Titans and Troia seems to have gotten 6 powers from each pair of Titans. For the other powers, just look up the powers of the 6 pairs of Titans.