how to add title in customer login page using xml in magento 2
If you want to change customer login create a file name with customer_account_login.xml add below code:
<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<!-- and for the page title: -->
<referenceBlock name="page.main.title">
<action method="setPageTitle">
<argument translate="true" name="title" xsi:type="string">Recipe</argument>
</action>
</referenceBlock>
</body>
</page>