Regardless of how you request for your company name to appear, ASIC will only issue a Certificates of Registration with your company name in capitals.
So while the rest of your paperwork may show your company name in title case (or however you requested it to appear), your Certificate of Registration will always show it in all capitals. It cannot be requested any other way.
Please note that all other documents can have your company name exactly as you wish it to appear, as long as it has been approved by ASIC.