Use \newcommand without the text styles added to it - latex

Question

This is a weird question and I don't know if I was able to formulate it that well.
So, I declare a newcommand somewhere like this:
\newcommand{\examplecommand}{\textbf{\textit{exampletext}}}
It'll be used quite many times this way.
I'm trying to also use it in one place in the document, wanting to format it in a different way (with \textsc{}, and none of the bolding and italicization)
I tried doing stuff like
\textsc{\examplecommand}
But that doesn't work, it still somehow prioritizes the formatting in the command declaration.
How can I use the command without changing the declaration, but with different formatting?
EDIT (MWE):
document.tex
--------------------
\documentclass{book}
\usepackage{fancyhdr}
\usepackage{blindtext}
\newcommand{\booktitle}{} % create it empty at first, so that the files can change it
\newcommand{\textbfit}[1]{\textbf{\textit{#1}}} % combine bold and italic in one
\fancypagestyle{plain}{
\fancyhf{}
\fancyhead[RO,RE]{\textsc{\booktitle}}
\renewcommand{\headrulewidth}{2pt}
}
\begin{document}
\pagestyle{plain}
\chapter{example1}
\input{doc1}
\chapter{example2}
\input{doc2}
\chapter{example3}
\input{doc3}
\end{document}
doc1.tex
--------------------
\renewcommand{\booktitle}{\textbfit{``Title 1''}}
\booktitle\ is a very nice book, it's really great, buy it etcetcetc
\blindtext
doc2.tex
--------------------
\renewcommand{\booktitle}{\textbfit{``Title 2''}}
\booktitle\ is a very nice book, it's really great, buy it etcetcetc
\blindtext
doc3.tex
--------------------
\renewcommand{\booktitle}{\textbfit{``Title 3''}}
\booktitle\ is a very nice book, it's really great, buy it etcetcetc
\blindtext
The reason I want to be able to do this:
I have 12 documents that I wrote in a single-document form, and now I wish to make them work both in the single-document form (all of them having a separate .tex file that compiles them as a single document), and a form that puts them all into a large file.
I was using that \booktitle command across all of them, since they are all similar in general structure. And now when I wanted to also convert them into book form, I discovered I can use it to change the top right corner text inside the header (see that the definition of the plain fancypagestyle uses that command inside its fancyhead), but, in there, I want to use it with \textsc
The reason I don't want to change my command is because it means changing it across all of the documents inside, and I was just thinking I could do \textsc{\booktitle} and be done with it

Answer 1

You could temporarily switch off your \textbfit command:
\documentclass{book}
\usepackage{fancyhdr}
\usepackage{blindtext}
\newcommand{\booktitle}{} % create it empty at first, so that the files can change it
\newcommand{\textbfit}[1]{\textbf{\textit{#1}}} % combine bold and italic in one
\fancypagestyle{plain}{
\fancyhf{}
\fancyhead[RO,RE]{
\begingroup
\let\textbfit\relax
\textsc{\booktitle}
\endgroup
}
\renewcommand{\headrulewidth}{2pt}
}
\begin{document}
\pagestyle{plain}
\chapter{example1}
\renewcommand{\booktitle}{\textbfit{``Title 1''}}
\booktitle\ is a very nice book, it's really great, buy it etcetcetc
\blindtext
\end{document}