Question 1

is the mount plate made of titanium or aluminum?

Accepted Answer

Aluminum, titanium versions are out of stock.

Question 2

Looking to install on sp2022. what are the two screws for? sig sights don't have screws.

Accepted Answer

There are two pairs of screw holes on the plate; one pair for mounting the sight; another pair to secured the DPP Sight Mount to your SP2022 Slide (Top), which need to be done first. 
By reading your question, however, I wonder you might have never done sight change / swap before; you may want to get help from Gun Smith.

Question 3

Is there a dpp mount that fits the sig p320 with rmr holes?

Accepted Answer

DPP fitness has two factors 1) to the frame and 2) to RMR. You are posting the question under this particular DPP product model, and I am going to help you by decoding the title line, so you may read the title line to make sure you buy the right one (DPP has many different models). 
The title line clearly identified it fit P226 and P320, so the first part of your question gets "yes". You need to understand DPP mounts by replacing the original sight, you may needs a smith like me to help you do it, depends on how skillful you are and tools you have. Second part, you did not say what RMR (brand) you have, so I can't answer it but tell you to check with your RMR maker (if it is not Vortex Viper / Burris Fastfire / Ade) if it has the same footprint as any of these 3 model. Otherwise you need to search for another DPP model. Footprint is a little complicated, especially when your RMR is not a name brand, good thing about it is they usually will follow name brand's footprint. Installing DPP only needs "screw driver" that is included, and DPP is such good product as it comes with all fitting screws in small bag that are marked individually. If title line indicates it, it fits. 
Hope this help.

Question 4

Will it fit a Sig 1911 tacops?

Accepted Answer

Sorry,is it not fit

ASIN	B09DL8S124
Best Sellers Rank	#439,590 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1,420 in Sporting Optics Mounts
Brand Name	DPP Titanium
Color	Black, Red
Compatible Devices	Handgun
Customer Reviews	4.2 4.2 out of 5 stars (79)
Item Weight	0.3 Ounces
Magnification Maximum	7 x
Magnification Minimum	7 x
Manufacturer	DPP Titanium
Material Type	7075T6 Aluminum Black Anodized
Mounting Type	Picatinny Mount
Night vision	No
Product Style	low profile
Reticle Type	Dot
Sport Type	Hunting
Thread Type	Picatinny
UPC	750238964017

DPP Titanium Sight Mount for Sig P226,P320 Vortex Viper, Burris Fastfire, Ade

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