You can use this for setting default sort orders on post types.

    /* Sort posts in wp_list_table by column in ascending or descending order. */
    function custom_post_order($query){
    	/* 
    		Set post types.
    		_builtin => true returns WordPress default post types. 
    		_builtin => false returns custom registered post types. 
    	*/
    	$post_types = get_post_types(array('_builtin' => true), 'names');
    	/* The current post type. */
    	$post_type = $query->get('post_type');
    	/* Check post types. */
    	if(in_array($post_type, $post_types)){
    		/* Post Column: e.g. title */
    		if($query->get('orderby') == ''){
    			$query->set('orderby', 'title');
    		}
    		/* Post Order: ASC / DESC */
    		if($query->get('order') == ''){
    			$query->set('order', 'ASC');
    		}
    	}
    }
    if(is_admin()){
    	add_action('pre_get_posts', 'custom_post_order');
    }

You can use some of these example conditions...

    /* Effects all post types in the array. */
    if(in_array($post_type, $post_types)){
    	
    }
    
    /* Effects only a specific post type in the array of post types. */
    if(in_array($post_type, $post_types) && $post_type == 'your_post_type_name'){
    	
    }
    
    /* Effects all post types in the array of post types, except a specific post type. */
    if(in_array($post_type, $post_types) && $post_type != 'your_post_type_name'){
    	
    }

If you wanted to apply this sorting on ALL post types, regardless of whether or not they are "built-in"...

Change this:
`$post_types = get_post_types(array('_builtin' => true), 'names');`

To this:
`$post_types = get_post_types('', 'names');`