OK, with more data it looks like you want to capture everything after " - " up to "</title>". So...
while (<DATA>) {
print "/", m{ - (.*?)\s*</title>}, "/\n";
}
__DATA__
<title>GRP -134 - Grinding And Cutting Solution (ACME PR50 - Water Typ
+e) </title>
<title> GRP-123-1 - Grinding And Cutting Solution (Quakeroat 2780 UTC
+- Synthetic Type)</title>
<title> GRP-124 - Alkaline Rust Remover Solution</title>
<title> GRP-124-1 - Alkaline Rust Remover Solution (Ardvark 185 - Rust
+ Remover)</title>
<title> GRP-124-2 - Alkaline Rust Remover Solution (Ardvark 185L - Rus
+t Remover)</title>
<title> GRP-124-3 - Alkaline Rust Remover Solution (Bee-Dee J84AL - Ru
+st Remover)</title>
<title> GRP-124-4 - Alkaline Rust Remover Solution (Mag HD2-202 - Rust
+ Remover)</title>
<title> GRP-124-5 - Alkaline Rust Remover Solution (Turk 4181L - Rust
+Remover)</title>
<title> GRP-124-6 - Alkaline Rust Remover Solution (Turk 4181 - Rust R
+emover)</title>
<title> GRP-124-7 - Alkaline Rust Remover Solution (Bee-Dee J84A - Rus
+t Remover)</title>
<title> GRP-124-8 - Alkaline Rust Remover Solution (Cadilac HTP-1150 -
+ Rust Remover)</title>
<title> GRP-124-9 - Alkaline Rust Remover Solution (Cadilac HTP-1150L
+- Rust Remover)</title>
<title> GRP-124-10 - Alkaline Rust Remover (Titanium Long Soak)";
Output:
/usr/bin/perl -w /home/bri/git/cvsid/pm
/Grinding And Cutting Solution (ACME PR50 - Water Type)/
/Grinding And Cutting Solution (Quakeroat 2780 UTC - Synthetic Type)/
/Alkaline Rust Remover Solution/
/Alkaline Rust Remover Solution (Ardvark 185 - Rust Remover)/
/Alkaline Rust Remover Solution (Ardvark 185L - Rust Remover)/
/Alkaline Rust Remover Solution (Bee-Dee J84AL - Rust Remover)/
/Alkaline Rust Remover Solution (Mag HD2-202 - Rust Remover)/
/Alkaline Rust Remover Solution (Turk 4181L - Rust Remover)/
/Alkaline Rust Remover Solution (Turk 4181 - Rust Remover)/
/Alkaline Rust Remover Solution (Bee-Dee J84A - Rust Remover)/
/Alkaline Rust Remover Solution (Cadilac HTP-1150 - Rust Remover)/
/Alkaline Rust Remover Solution (Cadilac HTP-1150L - Rust Remover)/
//
The empty last match is due yo what I hope is copy-paste error in the data you posted