Code-Snippets-Functions/Execute a function on a child site/Relevanssi/use-yoast-seo-title-instead-post-title.txt

add_filter( 'relevanssi_post_title_before_tokenize', 'rlv_use_yoast_title', 10, 2 );
function rlv_use_yoast_title( $title, $post ) {
    return get_post_meta( $post->ID, '_yoast_wpseo_title', true );
}