Guerra de Titanes 2018-B was a professional wrestling event produced and scripted by the Mexican professional wrestling promotion Asistencia Asesoría y Administración (AAA) or Triple A. The event took place on December 2, 2018, and was held in the Palenque de la Feria in Aguascalientes City, Aguascalientes, Mexico. It was the second Guerra de Titanes event of the year and was broadcast on Twitch.tv.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Arkangel Divino, Dark Finder & Discovery defeated Extrem X, Principe Sfeir & Ultimo Maldito (10:31)
- Lady Shani defeated Faby Apache (c) and La Hiedra and Scarlett Bordeaux in Four Way Match to win the AAA Reina de Reinas Championship (6:59)
- La Mascara, La Parka Negra III & Taurus defeated Mamba, Maximo & Pimpinela Escarlata (9:04)
- El Hijo del Vikingo, Laredo Kid & Myzteziz Jr. defeated Nuevo Poder del Norte (Carta Brava Jr., Mocho Cota Jr. & Tito Santana) (c) to win the AAA World Trios Championship (10:26)
- La Parka II, Laredo Kid & Myzteziz Jr. defeated Los OGTs (Averno, Chessman & Súper Fly) by DQ (5:30)
- Los Mercenarios (Rey Escorpión & Texano Jr. (c) defeated Joe Lider & Pagano and Cíclope & Miedo Extremo to retain the AAA World Tag Team Championship (17:28)
- Drago defeated El Hijo del Fantasma (c) to win the AAA Latin American Championship (14:34)
- Blue Demon Jr. & Killer Kross (w/ Scarlett Bordeaux) defeated Dr. Wagner Jr. & Psycho Clown (10:13)