Commerce- Show the attribute label instead of product title?
Here's how this was accomplished in a custom module. This will use the taxonomy terms vs the product titles.

function custom_form_views_form_commerce_cart_form_default_alter(&amp;$form, &amp;$form_state) {


$vocabulary = taxonomy_vocabulary_machine_name_load('product_type');
  $terms = taxonomy_get_tree($vocabulary->vid);
  $terms_name = array();
  foreach ($terms as $term) {
    $terms_name[$term->tid] = $term->name;
  }

foreach ($form['edit_attributes'] as $key => $line_item) {
    if (isset($line_item['product_id']['#options']) &amp;&amp; $line_item['product_id']['#options']) {
      $options = array_keys($line_item['product_id']['#options']);
      $products = commerce_product_load_multiple($options);
      foreach ($line_item['product_id']['#options'] as $id => $name) {
        $form['edit_attributes'][$key]['product_id']['#options'][$id] =
          $terms_name[$products[$id]->field_product_type['und'][0]['tid']];
      }
      $form['edit_attributes'][$key]['product_id']['#title'] = 'Format';
    }
  }
}

function custom_form_alter(&amp;$form, &amp;$form_state, $form_id) {


if (strpos($form_id, 'commerce_cart_add_to_cart_form') === 0) {
    $vocabulary = taxonomy_vocabulary_machine_name_load('product_type');
    $terms = taxonomy_get_tree($vocabulary->vid);
    $terms_name = array();
    foreach ($terms as $term) {
      $terms_name[$term->tid] = $term->name;
    }

if (isset($form['product_id']['#options'])) {
  $options = array_keys($form['product_id']['#options']);
  $products = commerce_product_load_multiple($options);
  foreach ($options as $key) {
    $form['product_id']['#options'][$key] = $terms_name[$products[$key]-&gt;field_product_type['und'][0]['tid']];
  }
  $form['product_id']['#title'] = 'Format'; // added by Lynn. Works on product page, but no in cart
}


}
}