The title company is trying to prevent you from making a mistake. They are not trying to create a problem but to prevent a problem. If you think your husband is being difficult now, can you imagine the difficulty that would arise if he found out the you bought a property and he tried to assert a claim to it. The only sound advice that anyone on the forum can give you is to get legal advice.
If you want to buy property, you may want to speak to your attorney about your recourses, or about finalizing your divorce so that you can make a move without factoring in this "difficult" obstacle to your home ownership,
You have obviously already been told, perhaps by your realtor, that this will be the case. If you're hoping you'll get a different answer, or that there is way to get around it, then you'll see that there isn't.
Get thee to your attorney post haste!
Even if you lie and say you're single, your husband will still be entitled to 50% of the equity regardless if he paid anything or not because you acquired it while you were still married.