tribe_change_event_order.php

<?php
/**
 * This function lists the Events Alphabetically
 */

add_filter( 'pre_get_posts', 'tribe_change_event_order', 99 );

function tribe_change_event_order( $query ) {
  if ( tribe_is_past() || tribe_is_upcoming() || tribe_is_photo() ) {
  $query->set( 'orderby', 'title' );
  $query->set( 'order', 'ASC' );
  }
  
return $query;
}