Luis was the youngest of four children and only son of Don Juan B. Traconis and Ofelia Molina, born in Mérida, Yucatán, Mexico.
When Pérez Prado met Demetrio he invited him to join the chorus of his orchestra, which was the main attraction of the popular Teatro Margo.
In 1958, Demetrio songs were interpreted by major singers of that era: Pedro Vargas recorded "You're Poisoning"; Andy Russell, "Young and Beautiful"; Miguelito Valdez 'Mr.
He eventually returned as a composer, with songs such as "Day" (Angélica María); "The Wineglass" for Olga Guillot; "I Will", "Si Dios Me Quita la Vida" and "In Your Hair", (Javier Solis), "Bravo", (Celia Cruz), and "Te Necesito", for Carlos Lico Other songs, such as "Lean On My Soul", "The Devil and I", "Your Ashes and Mine", "In the Canteen", "Art Thou My Wife", "What a Night, What a Moon and What a Cat", "Hate", "Who will" (with Pablo Beltran Ruiz), "Make the Most Juice to Life", "My Only Fault", and many others were interpreted by artists such as Eydie Gormé, Billy Vaughn, Lola Flores, Roberto Ledezma, Lucha Villa, Elena Burke, The Barry Sisters, Tito Rodriguez, Lucecita Benitez Perete, Elis Regina, Gloria Lasso, Mona Bell, Rocio Dúrcal, Alberto Vazquez, Freddy Noriega, Manolo Muñoz, Marco Antonio Muñiz, Dean Martin, Tito Puente, José Antonio Méndez, Diego El Cigala, Michael Bublé and Luis Miguel.
It took Luis Demetrio several decades of exhaustive work and consists of 86 songs that address events between pre-Hispanic times and different presidents of Mexico.
On February 24, 2010, a bronze bust by sculptor Sergio Peraza Avila was unveiled at the Plaza de los Composers in Mexico City.