functions.php

<?php

add_filter( 'display_posts_shortcode_output', 'be_display_posts_hide_title', 10, 9 );
/**
 * Display Post Shortcode, Hide Title
 * Disable title with [display-posts include_title="false"]
 *
 * @author Bill Erickson
 * @link http://wordpress.org/support/topic/how-to-supress-the-title?replies=1#post-3673938
 *
 * @param string $output
 * @param array $original_atts
 * @param string $image
 * @param string $title
 * @param string $date
 * @param string $excerpt
 * @param string $inner_wrapper
 * @param string $content
 * @param array $class
 * @return string output
 */
function be_display_posts_hide_title( $output, $original_atts, $image, $title, $date, $excerpt, $inner_wrapper, $content, $class ) {
  if( isset( $original_atts['include_title'] ) && "false" == $original_atts['include_title'] ) {
		$title = '';
		if ( !empty( $excerpt ) ) 
			$excerpt = '<span class="excerpt">' . get_the_excerpt() . '</span>';

		$output = '<' . $inner_wrapper . ' class="' . implode( ' ', $class ) . '">' . $image . $title . $date . $excerpt . $content . '</' . $inner_wrapper . '>';
	}
		
	return $output;

}