change post order on post type archive / taxonomy archive

gistfile1.aw

add_action( 'pre_get_posts', 'child_sort_post_order' );

function child_sort_post_order( $query ) {

    if ( is_post_type_archive('my_post_type') || is_tax() ){


        $query->query_vars['orderby'] = 'title';
        $query->query_vars['order'] = 'asc';
        return;
    }

}