Titanium

ABOUT

Titanium is Tesoro’s award-winning co-ed contemporary a cappella ensemble, comprised of 16-18 students selected from Tesoro’s choral program. The ensemble rehearses twice a week outside of the normal school day under the direction of Tesoro alum and music educator, Erin Theodorakis. They also perform frequently at sporting events, pep rallies, and various other school and community events. Titanium has competed numerous times in the International Competition for High School A Cappella – the a cappella competition featured in the movie Pitch Perfect – and in 2023 were named Western Regional Champions and 4th in the nation at Finals in New York City. In 2025, they were featured showcase performers at the National A Cappella Convention in Orlando, Florida. The group has released several music videos, an EP, and has performed at the Grammy museum for director Quentin Tarantino. Titanium enjoys post-rehearsal boba, and group pizookie nights. You can check out their music video releases on YouTube, as well as their music on all streaming platforms.

AUDITIONS

For information on how to audition for Titanium, click here. Please submit your videos by Sunday, May 25th at 11:59pm.

TITANIUM HIGHLIGHTS

  • NATIONAL FINALISTS – INTERNATIONAL COMPETITION FOR HIGH SCHOOL A CAPPELLA (ICHSA)
  • 2023 WESTERN REGIONAL CHAMPIONS – ICHSA
  • OUTSTANDING CHOREOGRAPHY, VOCAL PERCUSSION, AND ARRANGEMENT AWARDS – ICHSA
  • FEATURED SHOWCASE PERFORMERS – NATIONAL A CAPPELLA CONVENTION (ORLANDO, FL)
  • FEATURED AT THE GRAMMY MUSEUM WITH PAUL REVERE & THE RIDERS AS PART OF PROMOTION FORONCE UPON A TIME IN HOLLYWOOD, DIRECTED BY QUENTIN TARANTINO
  • VIRAL MUSIC VIDEO – SOUND OF SILENCE 
  • MULTIPLE SINGLES & EP AVAILABLE ON SPOTIFY
STREAM TITANIUM ON SPOTIFY
TITANIUM VIDEOS

ERIN THEODORAKIS, DIRECTOR

Erin Theodorakis is a music educator and performer who is passionate about exploring music as a form of storytelling and as a way to bring people from all walks of life together. She holds a Master’s degree in Operatic Voice Performance from the Shepherd School of Music at Rice University, where she was a recipient of the Shepherd School’s Provost Award. Originally from Southern California, Professor Theodorakis graduated from Chapman University with a Bachelor of Music degree in both Vocal Performance and Music Education.  

Theodorakis has been working in and around choral groups for as long as she can remember. Currently, she serves as a staff singer in the Grammy award-winning Pacific Chorale under the direction of Robert Istad, and has the privilege of being a part of the vocal music staff at the Tesoro High School with fellow Chapman alums Professor Mikayla Feldman and Keith Hancock. 

On the opera stage, Theodorakis has played roles ranging from Jo March in Little Women to La Vecchia Zita in Gianni Schicchi. Most recently, she joined the Parnassus Society as La Marquise in their production of La Fille du Régiment. Theodorakis’s engagements on the concert stage have included solos in Bach’s Magnificat, the Vivaldi Gloria, Handel’s Messiah, and Mendelssohn’s Elijah, to name a few. For four years in a row between 2014 and 2017, Theodorakis was awarded first place in the National Association of Teachers of Singing Los Angeles Competition in her division. In 2021, Theodorakis was recognized as a district winner in the Metropolitan Opera Laffont Competition for the San Diego District. She went on to win an encouragement award at the Regional Competition in Los Angeles.

In addition to her classical music credits, Professor Theodorakis has spent over a decade in the world of contemporary a cappella. She began as a member and eventually the Music Director of Chapman’s very own Soundcheck, who she led to the finals of the International Competition for Collegiate A Cappella in 2016 – an honor awarded to only ten groups from the United States and the United Kingdom annually. She has gone on to lead Titanium, Tesoro High School’s award-winning a cappella ensemble. In 2023, Titanium was selected as a finalist in the International Competition for High School A Cappella, and placed fourth overall. Theodorakis is also an accomplished vocal arranger.

Outside of the classroom, Theodorakis has been running her own private voice studio since 2015. She strives to teach her students to use their whole body as their instrument, while simultaneously instilling in them a detailed knowledge of the vocal mechanism – empowering them with the confidence to be in control of their own voice. Students of hers have gone on to study music at NYU, UCLA, AMDA, San Francisco Conservatory, Oklahoma City University, and Chapman, among others.

As a proud Tesoro alumna, Erin is honored to be at her alma mater directing Titanium.