diff -u b/core/modules/link/lib/Drupal/link/Plugin/field/field_type/LinkItem.php b/core/modules/link/lib/Drupal/link/Plugin/field/field_type/LinkItem.php
--- b/core/modules/link/lib/Drupal/link/Plugin/field/field_type/LinkItem.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/field/field_type/LinkItem.php
@@ -95,7 +95,7 @@
     $element['title'] = array(
       '#type' => 'radios',
       '#title' => t('Allow link text'),
-      '#default_value' => $this->getInstance()->settings['title'],
+      '#default_value' => $this->getFieldDefinition()->getFieldSetting('title'),
       '#options' => array(
         DRUPAL_DISABLED => t('Disabled'),
         DRUPAL_OPTIONAL => t('Optional'),