From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: org mode latex export excude title
Date: Fri, 30 Dec 2016 11:55:48 -0800
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To: Ken Mankoff <mankoff@gmail.com>
Cc: Fanpeng Kong <kshark343@gmail.com>, Org-mode <emacs-orgmode@gnu.org>

On Fri, 30 Dec 2016, Ken Mankoff wrote:

> (setq-local org-latex-title-command "")
>
> Can be set as a buffer local variable.
>

True, but not relevant to the OPs query:

>>> Is there any way to excude the empty `\title{}` command?

And if you browse thru org-latex-template, you will see that

 	 "\\title{%s%s}\n"

is hard coded.  The value of org-latex-title-command has no effect on that 
part of the template.

So, the OP can either use a filter as I suggested or write a derived 
backend supplying a different template transcoder that drops the string 
quoted above.

Chuck