The majority of these fics are one-shots. There are very few multi-chaptered Tyzula fics in existence, but those that do exist are excellent and are included below.

Aneantir by nikipinz
They had once ruled the world - now all they had was each other. Azula, Mai, Ty Lee. Post-war. Based on the world of Ye Chang Meng Duo, written by Shinji Shasaki.

Blossoms by RadiantBeam
It was one thing, traveling with two of her closet friends, both of whom were female. It was quite another, choosing one as her mate. Another point entirely choosing Ty Lee.

Broken Dragon by nikipinz
Ty Lee visits Azula in prison, and subsequent action. Post-war.

Cold Flame by KeeganFiretamer
Azula is given a chance to redeem herself by taking a similar path as her brother did.

Die Trying by Sahara Storm
Ty Lee still thinks she’s the most amazing girl in the world.

Firelight by nikipinz
Sequel to Broken Dragon

Flawed by RadiantBeam
Ty Lee has always seen the girl. Not the princess. Just the girl.

Friendship by Pata Hikari
Ty Lee’s oldest friend visits her in jail.

The Girl Who Lost the Sun by vis-et-decus
When your dreams have ended, time can be transcended - remember me.

Horizons by Sahara Storm
Azula was taking what she deserved, because some things were that simple.

I Feel Everything by endlessdreamer13
Ty Lee decided long ago that she would feel everything in Azula’s place.

Left Unsaid by telayla
Ty Lee gasped through her tears and continued. “I never meant to love you like this.” “That’s alright…” Azula said softly. “I never meant to be loved.”

Memento Mori (WIP) by eastsidegallery
In the years after the war, Ty Lee chases ghosts. Azula confronts her own hubris and remembers her mortality.

Midnight Hours by Nikkel
Zuko discovers Azula’s sexuality in one of the most interesting of ways…

Monster by vermilionRED
“Azula spent the first day screaming, railing and raging until she could taste blood and feel her throat fraying from abusing the guards and cursing her brother and the stupid water peasant.”

Monster by RadiantBeam
Azula believes she is a monster. Ty Lee thinks differently.

Mortmain by nikipinz
(sequel to Aneantir) Mai returns to the Fire Nation, while Azula and Ty Lee fight for survival in the Earth Kingdom.

One of a Kind by Min Daae
No one understands why Ty Lee stays.

Pining for Pink by endlessdreamer13
She wasn’t exactly sure when it had started. She didn’t think it was there when they were children. She knew that she liked being around the bubbly girl a lot. As they grew older she definitely found herself drawn more to Ty Lee more than Mai.

Pink Aura by RadiantBeam
Ty Lee has always been very open about her emotions, much to Azula’s dismay and Mai’s amusement.

Playing With Fire by Darkauthor26
Ty Lee knows they shouldn’t do this. Azula thinks differently.

Unchained Destiny by Elvensilver
“What are you doing here?” Azula croaked out, unable to understand why Ty Lee, one of the very women that had betrayed her on the Boiling Rock, had come.

Vampire Kisses by DangerousDiamondDarling
Azula likes to bite… Ty Lee doesn’t mind.

White Cherry Women by YoyoWarrior
Azula is released from prison on her 18th birthday to live with her Uncle. Fluffy Fire Lord Zuko wants to make her “good”. He wants to give her another chance. Boy, does he need a wake up call.