#!/usr/bin/perl
use strict;
use warnings;

open my $fh, '<', \<<EOF;
Title 1
Line of text A
Line of text B
Title 2
Line of text C
Title 3
Title 4
Line of text D
EOF

{
	local $/;
	print reverse <$fh> =~ /(^Title(?:(?!^Title).)*)/msg;
}