One they get big enough, they slow down from ludicrously fast to still ludicrously fast. The smallest impactor shown in that table enters at 17 km/s, loses 90% of its energy traversing the atmosphere and smacks the ground at nearly 5km/s. You'll probably want to take your titanium armour and stand somewhere else.
https://en.wikipedia.org/wiki/Impact_event#Airbursts
One they get big enough, they slow down from ludicrously fast to still ludicrously fast. The smallest impactor shown in that table enters at 17 km/s, loses 90% of its energy traversing the atmosphere and smacks the ground at nearly 5km/s. You'll probably want to take your titanium armour and stand somewhere else.